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Comirnaty (COVID-19 vaccine, mRNA for Injection): Side Effects, Uses, Dosage, Interactions, Warnings

Comirnaty

Medical Editor: John P. Cunha, DO, FACOEP Last updated on RxList: 12/16/2025

Drug Summary

What Is Comirnaty?

Comirnaty (COVID-19 vaccine, mRNA) is a vaccine indicated for active immunization to prevent coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in individuals 16 years of age and older.

What Are Side Effects of Comirnaty?

Comirnaty may cause serious side effects including:

  • hives,
  • difficulty breathing,
  • swelling of your face, lips, tongue, or throat,
  • severe dizziness,
  • itching,
  • confusion,
  • fainting,
  • vomiting,
  • diarrhea,
  • fast heartbeats,
  • wheezing,
  • pale or clammy skin,
  • sweating,
  • feeling warm or cold,
  • anxiety,
  • nauseated,
  • weakness,
  • lightheadedness,
  • slow heartbeats,
  • rapid breathing, and
  • changes in vision or hearing

Get medical help right away, if you have any of the symptoms listed above.

Side effects of Comirnaty include:

  • injection site reactions (pain, swelling, redness),
  • fatigue, 
  • headache, 
  • muscle pain,
  • chills,
  • joint pain, and
  • fever.

Seek medical care or call 911 at once if you have the following serious side effects:

  • Serious eye symptoms such as sudden vision loss, blurred vision, tunnel vision, eye pain or swelling, or seeing halos around lights;
  • Serious heart symptoms such as fast, irregular, or pounding heartbeats; fluttering in your chest; shortness of breath; and sudden dizziness, lightheadedness, or passing out;
  • Severe headache, confusion, slurred speech, arm or leg weakness, trouble walking, loss of coordination, feeling unsteady, very stiff muscles, high fever, profuse sweating, or tremors.

This document does not contain all possible side effects and others may occur. Check with your physician for additional information about side effects.


Dosage for Comirnaty

Comirnaty is administered intramuscularly as a series of 2 doses (0.3 mL each) 3 weeks apart.

Comirnaty In Children

Safety and effectiveness of Comirnaty in individuals 16 through 17 years of age is based on safety and effectiveness data in this age group and in adults. 

The safety and effectiveness of Comirnaty in individuals younger than 16 years of age have not been established. 

What Drugs, Substances, or Supplements Interact with Comirnaty?


Comirnaty may interact with other medicines.

Tell your doctor all medications and supplements you use and all vaccines you recently received.

Comirnaty During Pregnancy and Breastfeeding

Tell your doctor if you are pregnant or plan to become pregnant before using Comirnaty; it is unknown how it might affect a fetus. There is a pregnancy exposure registry that monitors pregnancy outcomes in women exposed to Comirnaty during pregnancy. Women who are vaccinated with Comirnaty during pregnancy are encouraged to enroll in the registry by visiting https://mothertobaby.org/ongoing-study/covid19-vaccines/. It is unknown if Comirnaty passes into breast milk. Consult your doctor before breastfeeding. 

Additional Information

Our Comirnaty (COVID-19 vaccine, mRNA) Suspension For Injection, For Intramuscular Use Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication. 

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Description for Comirnaty

COMIRNATY (COVID-19 Vaccine, mRNA) is a sterile suspension for injection for intramuscular use. COMIRNATY is supplied as a frozen suspension in multiple dose vials; each vial must be diluted with 1.8 mL of sterile 0.9% Sodium Chloride Injection, USP prior to use to form the vaccine. Each dose of COMIRNATY contains 30 mcg of a nucleoside-modified messenger RNA (mRNA) encoding the viral spike (S) glycoprotein of SARS-CoV-2.

Each 0.3 mL dose of the COMIRNATY also includes the following ingredients: lipids (0.43 mg ((4-hydroxybutyl)azanediyl)bis(hexane-6,1-diyl)bis(2-hexyldecanoate), 0.05 mg 2-(polyethylene glycol 2000)-N,N-ditetradecylacetamide, 0.09 mg 1,2-distearoyl-sn-glycero-3-phosphocholine, and 0.2 mg cholesterol), 0.01 mg potassium chloride, 0.01 mg monobasic potassium phosphate, 0.36 mg sodium chloride, 0.07 mg dibasic sodium phosphate dihydrate, and 6 mg sucrose. The diluent (0.9% Sodium Chloride Injection, USP) contributes an additional 2.16 mg sodium chloride per dose.

COMIRNATY does not contain preservative.

The vial stoppers are not made with natural rubber latex.

ADVERSE REACTIONS

An overview of clinical studies contributing to the safety assessment of COMIRNATY is provided in Table 1 and Table 2. Participants in these clinical studies received a single dose or a 2-dose series administered 3 weeks apart (referred to as a primary series) and subsequent doses referred to as booster doses.

Table 1: Clinical Studies — Adults and Adolescents 12 Years of Age and Older

Study

Age Group

Vaccine Strain Composition

Dosing

Number of Participants

Primary Series

Study 1 (NCT04380701)

18 through 55 years of age

Originala

Primary series

60

Study 2 (NCT04368728)

16 years of age and older

Originala

Primary series

22,026b

12 through 15 years of age

Originala

Primary series

1,131b

Booster Dose

Study 4 (NCT04955626)

16 years of age and older

Originala

1st booster

5,081b

Study 2 (NCT04368728)

18 through 55 years of age

Originala

1st booster

306

Study 4 (NCT04955626)

12 through 17 years of age

Originala

1st booster

65

Study 2 (NCT04368728)

12 through 15 years of age

Originala

1st booster

825

Study 5 (NCT05472038)

12 years of age and older

Original and Omicron BA.4/BA.5c

 2nd booster

726

Concomitant Administration

Study 8 (NCT05310084)

18 through 64 years of age

Originala

2nd booster administered alone or concomitantly with Influenza Vaccined

1,128

Abbreviation: SARS-CoV-2 = severe acute respiratory syndrome coronavirus 2.
COMIRNATY encoding the viral spike (S) glycoprotein of SARS-CoV-2 Wuhan-Hu-1 strain [Original, 30 mcg nucleoside−modified messenger RNA (modRNA)].
b Received COMIRNATY during placebo-control period.
Vaccine encoding the viral spike (S) glycoprotein of SARS-CoV-2 Wuhan-Hu-1 strain (Original) and Omicron variant lineages BA.4 and BA.5 (Omicron BA.4/BA.5), previously authorized as Pfizer-BioNTech COVID-19 Vaccine, Bivalent (30 mcg modRNA).
Influenza Vaccine (Afluria® Quadrivalent).

Table 2: Clinical Studies Children 5 Years Through 11 Years of Age

Study

Age Group

Vaccine Strain Composition

Dosing

Number of Participants

Primary Series

Study 3 (NCT04816643)

5 through 11 years of age

Originala

Primary series

3,109b

Booster Dose

Study 3 (NCT04816643)

5 through 11 years of age

Originala

1st booster

2,408

Study 6 (NCT05543616)

5 through 11 years of age

Original and Omicron BA.4/BA.5c

2nd booster

113

Single Dose

Study 6 (NCT05543616)

5 through 11 years of age

Omicron XBB.1.5d

Single dose

310

Abbreviation: SARS-CoV-2 = severe acute respiratory syndrome coronavirus 2.
COMIRNATY encoding the viral spike (S) glycoprotein of SARS-CoV-2 Wuhan-Hu-1 strain (Original, 10 mcg modRNA).
Received COMIRNATY during placebo-control period.
Vaccine encoding the viral spike (S) glycoprotein of SARS-CoV-2 Wuhan-Hu-1 strain (Original) and Omicron variant lineages BA.4 and BA.5 (Omicron BA.4/BA.5), previously authorized as Pfizer-BioNTech COVID-19 Vaccine, Bivalent (10 mcg modRNA).
COMIRNATY encoding the viral spike (S) glycoprotein of SARS-CoV-2 Omicron 1.5 (10 mcg modRNA).

Participants 12 years of age and older: The most commonly reported adverse reactions (≥10%) after a dose of COMIRNATY were pain at the injection site (up to 90.5%), fatigue (up to 77.5%), headache (up to 75.5%), chills (up to 49.2%), muscle pain (up to 45.5%), joint pain (up to 27.5%), fever (up to 24.3%), injection site swelling (up to 11.8%), and injection site redness (up to 10.4%).

Participants 5 years through 11 years of age: The most commonly reported adverse reactions (≥5%) following any dose were pain at the injection site (up to 83.8%), fatigue (up to 51.9%), headache (up to 38.4%), injection site redness (up to 25.9%), injection site swelling (up to 20.0%), muscle pain (up to 18.1%), chills (up to 13.3%), fever (up to 7.8%), and joint pain (up to 7.6%).

Clinical Trials Experience

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a vaccine cannot be directly compared to rates in the clinical trials of another vaccine and may not reflect the rates observed in practice.

Adults and Adolescents 12 Years of Age and Older

Two-Dose Series (Original Monovalent) in Vaccine-Naïve Individuals 16 Years of Age and Older

The safety of a 2-dose primary series of COMIRNATY was evaluated in participants 12 years of age and older in 2 clinical studies conducted in Germany (Study 1), United States, Argentina, Brazil, Turkey, South Africa, and Germany (Study 2). Study BNT162-01 (Study 1) was a Phase 1/2, 2-part, dose-escalation trial that enrolled 60 participants, 18 through 55 years of age and 36 participants, 56 through 85 years of age. Study 2 was a Phase 1/2/3 multicenter, randomized, saline placebo-controlled, double-blinded (Phase 2/3), dose-finding, vaccine candidate-selection and efficacy study that enrolled approximately 44,000 participants 16 years of age or older (22,026 COMIRNATY; 22,021 placebo).

Study 2 included 200 participants with confirmed stable human immunodeficiency virus (HIV) infection. Confirmed stable HIV infection was defined as documented viral load <50 copies/mL and CD4 count >200 cells/mm3 within 6 months before enrollment, and on stable antiretroviral therapy for at least 6 months. HIV-positive participants are included in the safety population but are summarized separately in the safety analyses.

In Study 2, participants 16 years and older in the reactogenicity subset were monitored using an electronic diary for solicited local and systemic reactions and use of antipyretic medication after each vaccination. Participants were also monitored for unsolicited adverse events throughout the study (from Dose 1 through 1 month [all unsolicited adverse events] or through 6 months [serious adverse events] after the last vaccination). Tables 3 and 6 present the frequency and severity of solicited local and systemic reactions, respectively, within 7 days following Dose 1 or Dose 2 of COMIRNATY.

At the time of the analysis of Study 2 with a data cutoff of March 13, 2021, there were 25,651 (58.2%) participants (13,031 COMIRNATY; 12,620 placebo) 16 years of age and older followed for ≥4 months after the second dose.

Demographic characteristics in Study 2 were generally similar with regard to age, sex, race, and ethnicity among participants who received COMIRNATY and those who received placebo. Overall, among the total participants who received either COMIRNATY or placebo, 50.9% were male, 49.1% were female, 79.3% were 16 through 64 years of age, 20.7% were 65 years of age and older, 82.0% were White, 9.6% were Black or African American, 25.9% were Hispanic/Latino, 4.3% were Asian, and 1.0% were American Indian or Alaska Native.

Local and Systemic Solicited Adverse Reactions

In participants 16 through 55 years of age after receiving Dose 2, the mean duration of pain at the injection site was 2.5 days (range 1 to 70 days), for redness 2.2 days (range 1 to 9 days), and for swelling 2.1 days (range 1 to 8 days) for participants in the COMIRNATY group.

In participants 56 years of age and older after receiving Dose 2, the mean duration of pain at the injection site was 2.4 days (range 1 to 36 days), for redness 3.0 days (range 1 to 34 days), and for swelling 2.6 days (range 1 to 34 days) for participants in the COMIRNATY group.

Table 3: Study 2 Frequency and Percentages of Participants With Solicited Local Reactions, by Maximum Severity, Within 7 Days After Each Dose — Participants 16 Through 55 Years of Age — Reactogenicity Subset of the Safety Population*

COMIRNATY
Dose 1

Na=2899
nb (%)

Placebo
Dose 1
Na=2908
nb (%)

COMIRNATY
Dose 2

Na=2682
nb (%)

Placebo
Dose 2
Na=2684
nb (%)

Rednessc

Any (>2.0 cm)

156 (5.4)

28 (1.0)

151 (5.6)

18 (0.7)

Mild

113 (3.9)

19 (0.7)

90 (3.4)

12 (0.4)

Moderate

36 (1.2)

6 (0.2)

50 (1.9)

6 (0.2)

Severe

7 (0.2)

3 (0.1)

11 (0.4)

0

Swellingc

Any (>2.0 cm)

184 (6.3)

16 (0.6)

183 (6.8)

5 (0.2)

Mild

124 (4.3)

6 (0.2)

110 (4.1)

3 (0.1)

Moderate

54 (1.9)

8 (0.3)

66 (2.5)

2 (0.1)

Severe

6 (0.2)

2 (0.1)

7 (0.3)

0

Pain at the injection sited

Any

2426 (83.7)

414 (14.2)

2101 (78.3)

312 (11.6)

Mild

1464 (50.5)

391 (13.4)

1274 (47.5)

284 (10.6)

Moderate

923 (31.8)

20 (0.7)

788 (29.4)

28 (1.0)

Severe

39 (1.3)

3 (0.1)

39 (1.5)

0

Notes: Reactions were collected in the electronic diary (e-diary) from Day 1 to Day 7 after vaccination. No Grade 4 solicited local reactions were reported in participants 16 through 55 years of age.
* Randomized participants in the safety analysis population who received at least 1 dose of the study intervention. Participants with chronic, stable HIV infection were excluded.
Vaccine encoding the viral spike (S) glycoprotein of SARS-CoV-2 Wuhan-Hu-1 strain (Original).
N = Number of participants reporting at least 1 yes or no response for the specified reaction after the specified The N for each reaction was the same, therefore, this information was included in the column header.
n = Number of participants with the specified reaction.
Mild: >2.0 to ≤5.0 cm; Moderate: >5.0 to ≤10.0 cm; Severe: >10.0 cm.
Mild: does not interfere with activity; Moderate: interferes with activity; Severe: prevents daily activity.

Table 4: Study 2 Frequency and Percentages of Participants With Solicited Systemic Reactions, by Maximum Severity, Within 7 Days After Each Dose Participants 16 Through 55 Years of Age Reactogenicity Subset of the Safety Population*

COMIRNATY
Dose 1

Na=2899
nb (%)

Placebo
Dose 1
Na=2908
nb (%)

COMIRNATY
Dose 2

Na=2682
nb (%)

Placebo
Dose 2
Na=2684
nb (%)

Fever

≥38.0°C

119 (4.1)

25 (0.9)

440 (16.4)

11 (0.4)

≥38.0°C to 38.4°C

86 (3.0)

16 (0.6)

254 (9.5)

5 (0.2)

>38.4°C to 38.9°C

25 (0.9)

5 (0.2)

146 (5.4)

4 (0.1)

>38.9°C to 40.0°C

8 (0.3)

4 (0.1)

39 (1.5)

2 (0.1)

>40.0°C

0

0

1 (0.0)

0

Fatiguec

Any

1431 (49.4)

960 (33.0)

1649 (61.5)

614 (22.9)

Mild

760 (26.2)

570 (19.6)

558 (20.8)

317 (11.8)

Moderate

630 (21.7)

372 (12.8)

949 (35.4)

283 (10.5)

Severe

41 (1.4)

18 (0.6)

142 (5.3)

14 (0.5)

Headachec

Any

1262 (43.5)

975 (33.5)

1448 (54.0)

652 (24.3)

Mild

785 (27.1)

633 (21.8)

699 (26.1)

404 (15.1)

Moderate

444 (15.3)

318 (10.9)

658 (24.5)

230 (8.6)

Severe

33 (1.1)

24 (0.8)

91 (3.4)

18 (0.7)

Chillsc

Any

479 (16.5)

199 (6.8)

1015 (37.8)

114 (4.2)

Mild

338 (11.7)

148 (5.1)

477 (17.8)

89 (3.3)

Moderate

126 (4.3)

49 (1.7)

469 (17.5)

23 (0.9)

Severe

15 (0.5)

2 (0.1)

69 (2.6)

2 (0.1)

Vomitingd

Any

34 (1.2)

36 (1.2)

58 (2.2)

30 (1.1)

Mild

29 (1.0)

30 (1.0)

42 (1.6)

20 (0.7)

Moderate

5 (0.2)

5 (0.2)

12 (0.4)

10 (0.4)

Severe

0

1 (0.0)

4 (0.1)

0

Diarrheae

Any

309 (10.7)

323 (11.1)

269 (10.0)

205 (7.6)

Mild

251 (8.7)

264 (9.1)

219 (8.2)

169 (6.3)

Moderate

55 (1.9)

58 (2.0)

44 (1.6)

35 (1.3)

Severe

3 (0.1)

1 (0.0)

6 (0.2)

1 (0.0)

New or worsened muscle painc

Any

664 (22.9)

329 (11.3)

1055 (39.3)

237 (8.8)

Mild

353 (12.2)

231 (7.9)

441 (16.4)

150 (5.6)

Moderate

296 (10.2)

96 (3.3)

552 (20.6)

84 (3.1)

Severe

15 (0.5)

2 (0.1)

62 (2.3)

3 (0.1)

New or worsened joint painc

Any

342 (11.8)

168 (5.8)

638 (23.8)

147 (5.5)

Mild

200 (6.9)

112 (3.9)

291 (10.9)

82 (3.1)

Moderate

137 (4.7)

55 (1.9)

320 (11.9)

61 (2.3)

Severe

5 (0.2)

1 (0.0)

27 (1.0)

4 (0.1)

Use of antipyretic or pain medicationf

805 (27.8)

398 (13.7)

1213 (45.2)

320 (11.9)

Notes: Reactions and use of antipyretic or pain medication were collected in the electronic diary (e-diary) from Day 1 to Day 7 after each dose.
No Grade 4 solicited systemic reactions were reported in participants 16 through 55 years of age.
* Randomized participants in the safety analysis population who received at least 1 dose of the study intervention. Participants with chronic, stable HIV infection were excluded.
Vaccine encoding the viral spike (S) glycoprotein of SARS-CoV-2 Wuhan-Hu-1 strain (Original).
N = Number of participants reporting at least 1 yes or no response for the specified reaction after the specified The N for each reaction or use of antipyretic or pain medication was the same, therefore, this information was included in the column header.
n = Number of participants with the specified reaction.
Mild: does not interfere with activity; Moderate: some interference with activity; Severe: prevents daily activity.
Mild: 1 to 2 times in 24 hours; Moderate: >2 times in 24 hours; Severe: requires intravenous hydration.
Mild: 2 to 3 loose stools in 24 hours; Moderate: 4 to 5 loose stools in 24 hours; Severe: 6 or more loose stools in 24 hours.
Severity was not collected for use of antipyretic or pain medication.

Table 5: Study 2 Frequency and Percentages of Participants With Solicited Local Reactions, by Maximum Severity, Within 7 Days After Each Dose Participants 56 Years of Age and Older Reactogenicity Subset of the Safety Population*

COMIRNATY
Dose 1
Na=2008
nb (%)

Placebo
Dose 1
Na=1989
nb (%)

COMIRNATY
Dose 2

Na=1860
nb (%)

Placebo
Dose 2
Na=1833
nb (%)

Rednessc

Any (>2.0 cm)

106 (5.3)

20 (1.0)

133 (7.2)

14 (0.8)

Mild

71 (3.5)

13 (0.7)

65 (3.5)

10 (0.5)

Moderate

30 (1.5)

5 (0.3)

58 (3.1)

3 (0.2)

Severe

5 (0.2)

2 (0.1)

10 (0.5)

1 (0.1)

Swellingc

Any (>2.0 cm)

141 (7.0)

23 (1.2)

145 (7.8)

13 (0.7)

Mild

87 (4.3)

11 (0.6)

80 (4.3)

5 (0.3)

Moderate

52 (2.6)

12 (0.6)

61 (3.3)

7 (0.4)

Severe

2 (0.1)

0

4 (0.2)

1 (0.1)

Pain at the injection sited

Any (>2.0 cm)

1408 (70.1)

185 (9.3)

1230 (66.1)

143 (7.8)

Mild

1108 (55.2)

177 (8.9)

873 (46.9)

138 (7.5)

Moderate

296 (14.7)

8 (0.4)

347 (18.7)

5 (0.3)

Severe

4 (0.2)

0

10 (0.5)

0

Notes: Reactions were collected in the electronic diary (e-diary) from Day 1 to Day 7 after vaccination. No Grade 4 solicited local reactions were reported in participants 56 years of age and older.
* Randomized participants in the safety analysis population who received at least 1 dose of the study intervention. Participants with chronic, stable HIV infection were excluded.
Vaccine encoding the viral spike (S) glycoprotein of SARS-CoV-2 Wuhan-Hu-1 strain (Original).
N = Number of participants reporting at least 1 yes or no response for the specified reaction after the specified The N for each reaction was the same, therefore, the information was included in the column header.
n = Number of participants with the specified reaction.
Mild: >2.0 to ≤5.0 cm; Moderate: >5.0 to ≤10.0 cm; Severe: >10.0 cm.
Mild: does not interfere with activity; Moderate: interferes with activity; Severe: prevents daily activity.

Table 6: Study 2 Frequency and Percentages of Participants With Solicited Systemic Reactions, by Maximum Severity, Within 7 Days After Each Dose Participants 56 Years of Age and Older Reactogenicity Subset of the Safety Population*

COMIRNATY
Dose 1

Na=2008
nb (%)

Placebo
Dose 1
Na=1989
nb (%)

COMIRNATY
Dose 2

Na=1860
nb (%)

Placebo
Dose 2
Na=1833
nb (%)

Fever

≥38.0°C

26 (1.3)

8 (0.4)

219 (11.8)

4 (0.2)

≥38.0°C to 38.4°C

23 (1.1)

3 (0.2)

158 (8.5)

2 (0.1)

>38.4°C to 38.9°C

2 (0.1)

3 (0.2)

54 (2.9)

1 (0.1)

>38.9°C to 40.0°C

1 (0.0)

2 (0.1)

7 (0.4)

1 (0.1)

>40.0°C

0

0

0

0

Fatiguec

Any

677 (33.7)

447 (22.5)

949 (51.0)

306 (16.7)

Mild

415 (20.7)

281 (14.1)

391 (21.0)

183 (10.0)

Moderate

259 (12.9)

163 (8.2)

497 (26.7)

121 (6.6)

Severe

3 (0.1)

3 (0.2)

60 (3.2)

2 (0.1)

Grade 4

0

0

1 (0.1)

0

Headachec

Any

503 (25.0)

363 (18.3)

733 (39.4)

259 (14.1)

Mild

381 (19.0)

267 (13.4)

464 (24.9)

189 (10.3)

Moderate

120 (6.0)

93 (4.7)

256 (13.8)

65 (3.5)

Severe

2 (0.1)

3 (0.2)

13 (0.7)

5 (0.3)

Chillsc

Any

130 (6.5)

69 (3.5)

435 (23.4)

57 (3.1)

Mild

102 (5.1)

49 (2.5)

229 (12.3)

45 (2.5)

Moderate

28 (1.4)

19 (1.0)

185 (9.9)

12 (0.7)

Severe

0

1 (0.1)

21 (1.1)

0

Vomitingd

Any

10 (0.5)

9 (0.5)

13 (0.7)

5 (0.3)

Mild

9 (0.4)

9 (0.5)

10 (0.5)

5 (0.3)

Moderate

1 (0.0)

0

1 (0.1)

0

Severe

0

0

2 (0.1)

0

Diarrheae

Any

168 (8.4)

130 (6.5)

152 (8.2)

102 (5.6)

Mild

137 (6.8)

109 (5.5)

125 (6.7)

76 (4.1)

Moderate

27 (1.3)

20 (1.0)

25 (1.3)

22 (1.2)

Severe

4 (0.2)

1 (0.1)

2 (0.1)

4 (0.2)

New or worsened muscle painc

Any

274 (13.6)

165 (8.3)

537 (28.9)

99 (5.4)

Mild

183 (9.1)

111 (5.6)

229 (12.3)

65 (3.5)

Moderate

90 (4.5)

51 (2.6)

288 (15.5)

33 (1.8)

Severe

1 (0.0)

3 (0.2)

20 (1.1)

1 (0.1)

New or worsened joint painc

Any

175 (8.7)

124 (6.2)

353 (19.0)

72 (3.9)

Mild

119 (5.9)

78 (3.9)

183 (9.8)

44 (2.4)

Moderate

53 (2.6)

45 (2.3)

161 (8.7)

27 (1.5)

Severe

3 (0.1)

1 (0.1)

9 (0.5)

1 (0.1)

Use of antipyretic or pain medicationf

382 (19.0)

224 (11.3)

688 (37.0)

170 (9.3)

Notes: Reactions and use of antipyretic or pain medication were collected in the electronic diary (e-diary) from Day 1 to Day 7 after each dose.
The only Grade 4 solicited systemic reaction reported in participants 56 years of age and older was fatigue.
* Randomized participants in the safety analysis population who received at least 1 dose of the study intervention. Participants with chronic, stable HIV infection were excluded.
Vaccine encoding the viral spike (S) glycoprotein of SARS-CoV-2 Wuhan-Hu-1 strain (Original).
N = Number of participants reporting at least 1 yes or no response for the specified reaction after the specified N for each reaction or use of antipyretic or pain medication was the same, therefore was included in the column header.
n = Number of participants with the specified reaction.
Mild: does not interfere with activity; Moderate: some interference with activity; Severe: prevents daily activity; Grade 4 reactions were defined in the clinical study protocol as emergency room visit or hospitalization for severe fatigue, severe headache, severe chills, severe muscle pain, or severe joint pain.
Mild: 1 to 2 times in 24 hours; Moderate: >2 times in 24 hours; Severe: requires intravenous hydration; Grade 4 emergency visit or hospitalization for severe vomiting.
Mild: 2 to 3 loose stools in 24 hours; Moderate: 4 to 5 loose stools in 24 hours; Severe: 6 or more loose stools in 24 hours; Grade 4: emergency room or hospitalization for severe diarrhea.
Severity was not collected for use of antipyretic or pain medication.

In participants with chronic, stable HIV infection the frequencies of solicited local and systemic adverse reactions were similar to or lower than those observed for all participants 16 years of age and older.

Unsolicited Adverse Events

Overall, 11,253 (51.1%) participants 16 years of age and older in the COMIRNATY group and 11,316 (51.4%) participants in the placebo group had follow-up time between ≥4 months to <6 months after Dose 2 in the blinded placebo-controlled follow-up period with an additional 1,778 (8.1%) and 1,304 (5.9%) with ≥6 months of blinded follow-up time in the COMIRNATY and placebo groups, respectively.

A total of 12,006 (54.5%) participants originally randomized to COMIRNATY had ≥6 months total (blinded and unblinded) follow-up after Dose 2.

In an analysis of all unsolicited adverse events reported following any dose, through 1 month after Dose 2, in participants 16 years of age and older (N = 43,847; 21,926 COMIRNATY group vs. 21,921 placebo group), those assessed as adverse reactions not already captured by solicited local and systemic reactions were nausea (274 vs. 87), malaise (130 vs. 22), lymphadenopathy (83 vs. 7), asthenia (76 vs. 25), decreased appetite (39 vs. 9), hyperhidrosis (31 vs. 9), lethargy (25 vs. 6), and night sweats (17 vs. 3).

In analyses of all unsolicited adverse events in Study 2 from Dose 1 up to the participant unblinding date, 58.2% of study participants had at least 4 months of follow-up after Dose 2. Among participants 16 through 55 years of age who received at least 1 dose of study vaccine, 12,995 of whom received COMIRNATY and 13,026 of whom received placebo, unsolicited adverse events were reported by 4,396 (33.8%) participants in the COMIRNATY group and 2,136 (16.4%) participants in the placebo group. In a similar analysis in participants 56 years of age and older that included 8,931 COMIRNATY recipients and 8,895 placebo recipients, unsolicited adverse events were reported by 2,551 (28.6%) participants in the COMIRNATY group and 1,432 (16.1%) participants in the placebo group. Among participants with confirmed stable HIV infection that included 100 COMIRNATY recipients and 100 placebo recipients, unsolicited adverse events were reported by 29 (29%) participants in the COMIRNATY group and 15 (15%) participants in the placebo group. The higher frequency of reported unsolicited adverse events among COMIRNATY recipients compared to placebo recipients was primarily attributed to events that are consistent with adverse reactions solicited among participants in the reactogenicity subset (Table 5 and Table 6).

Throughout the placebo-controlled safety follow-up period, Bell’s palsy (facial paralysis) was reported by 4 participants in the COMIRNATY group and 2 participants in the placebo group. Onset of facial paralysis was Day 37 after Dose 1 (participant did not receive Dose 2) and Days 3, 9, and 48 after Dose 2. In the placebo group the onset of facial paralysis was Day 32 and Day 102. Currently available information is insufficient to determine a causal relationship with the vaccine. In the analysis of blinded, placebo-controlled follow-up, there were no other notable patterns or numerical imbalances between treatment groups for specific categories of non-serious adverse events (including other neurologic or neuro-inflammatory, and thrombotic events) that would suggest a causal relationship to COMIRNATY. In the analysis of unblinded follow-up, there were no notable patterns of specific categories of non-serious adverse events that would suggest a causal relationship to COMIRNATY.

Serious Adverse Events

Participants 16 through 55 years of age in Study 2 who had received at least 1 dose of vaccine or placebo (COMIRNATY = 12,995; placebo = 13,026), reported serious adverse events from Dose 1 up to the participant unblinding date in ongoing follow-up as follows: 103 (0.8%) COMIRNATY recipients and 117 (0.9%) placebo recipients. In a similar analysis, in participants 56 years of age and older (8,931 COMIRNATY group and 8,895 placebo group), serious adverse events were reported by 165 (1.8%) COMIRNATY recipients and 151 (1.7%) placebo recipients who received at least 1 dose of COMIRNATY or placebo, respectively. In these analyses, 58.2% of study participants had at least 4 months of follow-up after Dose 2. Among participants with confirmed stable HIV infection serious adverse events from Dose 1 up to the participant unblinding date in ongoing follow-up were reported by 2 (2%) COMIRNATY recipients and 2 (2%) placebo recipients.

In the analysis of blinded, placebo-controlled follow-up, there were no notable patterns between treatment groups for specific categories of serious adverse events (including neurologic, neuro-inflammatory, and thrombotic events) that would suggest a causal relationship to COMIRNATY. In the analysis of unblinded follow-up, there were no notable patterns of specific categories of serious adverse events that would suggest a causal relationship to COMIRNATY.

Two-Dose Series (Original Monovalent) in Vaccine-Naïve Adolescents 12 Through 15 Years of Age

Study 2 was a Phase 1/2/3 multicenter, randomized, saline placebo-controlled, double-blinded (Phase 2/3), dose-finding, vaccine candidate-selection and efficacy study. In Study 2, 2,260 adolescents (1,131 COMIRNATY; 1,129 placebo) were 12 through 15 years of age. At the time of the analysis of the ongoing Study 2 with a data cutoff of September 2, 2021, there were 1,559 (69.0%) adolescents (786 COMIRNATY and 773 placebo) 12 through 15 years of age followed for ≥4 months after the second dose.

Demographic characteristics in Study 2 were generally similar with regard to age, sex, race, and ethnicity among adolescents who received COMIRNATY and those who received placebo. Overall, among the adolescents who received COMIRNATY, 50.1% were male and 49.9% were female, 85.8% were White, 4.6% were Black or African American, 11.7% were Hispanic/Latino, 6.4% were Asian, and 0.4% were American Indian/Alaska Native.

In Study 2, participants 12 through 15 years of age in the reactogenicity subset were monitored using an electronic diary for solicited local and systemic reactions and use of antipyretic medication after each vaccination. Participants were also monitored for unsolicited adverse events throughout the study (from Dose 1 through 1 month [all unsolicited adverse events] or through 6 months [serious adverse events] after the last vaccination). Tables 7 through 8 present the frequency and severity of solicited local and systemic reactions, respectively, within 7 days following Dose 1 or Dose 2 of COMIRNATY.

Local and Systemic Solicited Adverse Reactions

In adolescents 12 through 15 years of age after receiving Dose 2, the mean duration of pain at the injection site was 2.5 days (range 1 to 11 days), for redness 1.8 days (range 1 to 5 days), and for swelling 1.6 days (range 1 to 5 days) in the COMIRNATY group.

Table 7: Study 2 Frequency and Percentages of Adolescents With Solicited Local Reactions, by Maximum Severity, Within 7 Days After Each Dose Adolescents 12 Through 15 Years of Age Safety Population*

COMIRNATY
Dose 1
Na=1127
nb (%)

Placebo
Dose 1
Na=1127
nb (%)

COMIRNATY
Dose 2
Na=1097
nb (%)

Placebo
Dose 2 Na=1078
nb (%)

Rednessc

Any (>2 cm)

65 (5.8)

12 (1.1)

55 (5.0)

10 (0.9)

Mild

44 (3.9)

11 (1.0)

29 (2.6)

8 (0.7)

Moderate

20 (1.8)

1 (0.1)

26 (2.4)

2 (0.2)

Severe

1 (0.1)

0 (0.0)

0 (0.0)

0 (0.0)

Swellingc

Any (>2 cm)

78 (6.9)

11 (1.0)

54 (4.9)

6 (0.6)

Mild

55 (4.9)

9 (0.8)

36 (3.3)

4 (0.4)

Moderate

23 (2.0)

2 (0.2)

18 (1.6)

2 (0.2)

Severe

0 (0.0)

0 (0.0)

0 (0.0)

0 (0.0)

Pain at the injection sited

Any

971 (86.2)

263 (23.3)

866 (78.9)

193 (17.9)

Mild

467 (41.4)

227 (20.1)

466 (42.5)

164 (15.2)

Moderate

493 (43.7)

36 (3.2)

393 (35.8)

29 (2.7)

Severe

11 (1.0)

0 (0.0)

7 (0.6)

0 (0.0)

Note: Reactions were collected in the electronic diary (e-diary) from Day 1 to Day 7 after vaccination.
* Randomized participants in the safety analysis population who received at least 1 dose of the study intervention.
Vaccine encoding the viral spike (S) glycoprotein of SARS-CoV-2 Wuhan-Hu-1 strain (Original).
N = Number of participants reporting at least 1 yes or no response for the specified reaction after the specified dose.
n = Number of participants with the specified reaction.
Mild: >2.0 to ≤5.0 cm; Moderate: >5.0 to ≤10.0 cm; Severe: >10.0 cm.
Mild: does not interfere with activity; Moderate: interferes with activity; Severe: prevents daily activity.

Table 8: Study 2 Frequency and Percentages of Adolescents With Solicited Systemic Reactions, by Maximum Severity, Within 7 Days After Each Dose Adolescents 12 Through 15 Years of Age Safety Population*

COMIRNATY
Dose 1
Na=1127
nb (%)

Placebo
Dose 1
Na=1127
nb (%)

COMIRNATY
Dose 2
Na=1097
nb (%)

Placebo
Dose 2 Na=1078
nb (%)

Fever

≥38.0°C

114 (10.1)

12 (1.1)

215 (19.6)

7 (0.6)

≥38.0°C to 38.4°C

74 (6.6)

8 (0.7)

107 (9.8)

5 (0.5)

>38.4°C to 38.9°C

29 (2.6)

2 (0.2)

83 (7.6)

1 (0.1)

>38.9°C to 40.0°C

10 (0.9)

2 (0.2)

25 (2.3)

1 (0.1)

>40.0°C

1 (0.1)

0 (0.0)

0 (0.0)

0 (0.0)

Fatiguec

Any

677 (60.1)

457 (40.6)

726 (66.2)

264 (24.5)

Mild

278 (24.7)

250 (22.2)

232 (21.1)

133 (12.3)

Moderate

384 (34.1)

199 (17.7)

468 (42.7)

127 (11.8)

Severe

15 (1.3)

8 (0.7)

26 (2.4)

4 (0.4)

Headachec

Any

623 (55.3)

396 (35.1)

708 (64.5)

264 (24.5)

Mild

361 (32.0)

256 (22.7)

302 (27.5)

170 (15.8)

Moderate

251 (22.3)

131 (11.6)

384 (35.0)

93 (8.6)

Severe

11 (1.0)

9 (0.8)

22 (2.0)

1 (0.1)

Chillsc

Any

311 (27.6)

109 (9.7)

455 (41.5)

74 (6.9)

Mild

195 (17.3)

82 (7.3)

221 (20.1)

53 (4.9)

Moderate

111 (9.8)

25 (2.2)

214 (19.5)

21 (1.9)

Severe

5 (0.4)

2 (0.2)

20 (1.8)

0 (0.0)

Vomitingd

Any

31 (2.8)

10 (0.9)

29 (2.6)

12 (1.1)

Mild

30 (2.7)

8 (0.7)

25 (2.3)

11 (1.0)

Moderate

0 (0.0)

2 (0.2)

4 (0.4)

1 (0.1)

Severe

1 (0.1)

0 (0.0)

0 (0.0)

0 (0.0)

Diarrheae

Any

90 (8.0)

82 (7.3)

65 (5.9)

44 (4.1)

Mild

77 (6.8)

72 (6.4)

59 (5.4)

39 (3.6)

Moderate

13 (1.2)

10 (0.9)

6 (0.5)

5 (0.5)

Severe

0 (0.0)

0 (0.0)

0 (0.0)

0 (0.0)

New or worsened muscle painc

Any

272 (24.1)

148 (13.1)

355 (32.4)

90 (8.3)

Mild

125 (11.1)

88 (7.8)

152 (13.9)

51 (4.7)

Moderate

145 (12.9)

60 (5.3)

197 (18.0)

37 (3.4)

Severe

2 (0.2)

0 (0.0)

6 (0.5)

2 (0.2)

New or worsened joint painc

Any

109 (9.7)

77 (6.8)

173 (15.8)

51 (4.7)

Mild

66 (5.9)

50 (4.4)

91 (8.3)

30 (2.8)

Moderate

42 (3.7)

27 (2.4)

78 (7.1)

21 (1.9)

Severe

1 (0.1)

0 (0.0)

4 (0.4)

0 (0.0)

Use of antipyretic or pain medicationf

413 (36.6)

111 (9.8)

557 (50.8)

95 (8.8)

Note: Events and use of antipyretic or pain medication were collected in the electronic diary (e-diary) from Day 1 to Day 7 after each dose.
* Randomized participants in the safety analysis population who received at least 1 dose of the study intervention.
Vaccine encoding the viral spike (S) glycoprotein of SARS-CoV-2 Wuhan-Hu-1 strain (Original).
N = Number of participants reporting at least 1 yes or no response for the specified event after the specified dose.
n = Number of participants with the specified reaction.
Mild: does not interfere with activity; Moderate: some interference with activity; Severe: prevents daily activity.
Mild: 1 to 2 times in 24 hours; Moderate: >2 times in 24 hours; Severe: requires intravenous hydration.
Mild: 2 to 3 loose stools in 24 hours; Moderate: 4 to 5 loose stools in 24 hours; Severe: 6 or more loose stools in 24 hours.
Severity was not collected for use of antipyretic or pain medication.

Unsolicited Adverse Events

In Study 2, 2,260 adolescents (1,131 COMIRNATY; 1,129 placebo) were 12 through 15 years of age. Of these, 634 (56.1%) participants in the COMIRNATY group and 629 (55.7%) participants in the placebo group had follow-up time between ≥4 months to <6 months after Dose 2 in the blinded placebo-controlled follow-up period with an additional 152 (13.4%) and 144 (12.8%) with ≥6 months of blinded follow-up time in the COMIRNATY and placebo groups, respectively.

A total of 1,113 (98.4%) participants 12 through 15 years of age originally randomized to COMIRNATY had ≥6 months total (blinded and unblinded) follow-up after Dose 2. An analysis of all unsolicited adverse events in Study 2 from Dose 1 up to the participant unblinding date was conducted. Among participants 12 through 15 years of age who received at least 1 dose of study vaccine, unsolicited adverse events were reported by 95 (8.4%) participants in the COMIRNATY group and 113 (10.0%) participants in the placebo group. 

In an analysis of all unsolicited adverse events reported during blinded follow-up from Dose 1 through 1 month after Dose 2, in adolescents 12 to 15 years of age, those assessed as adverse reactions not already captured by solicited local and systemic reactions were lymphadenopathy (9 vs. 2), and nausea (5 vs. 2).

In the analysis of blinded, placebo-controlled follow-up, there were no other notable patterns or numerical imbalances between treatment groups for specific categories of unsolicited adverse events (including other neurologic or neuro-inflammatory, and thrombotic events) that would suggest a causal relationship to COMIRNATY. In the analysis of unblinded follow-up, there were no notable patterns of specific categories of non-serious adverse events that would suggest a causal relationship to COMIRNATY.

Serious Adverse Events

In Study 2, among participants 12 through 15 years of age who had received at least 1 dose of vaccine or placebo (COMIRNATY = 1,131; placebo = 1,129), serious adverse events from Dose 1 up to the participant unblinding date in ongoing follow-up were reported by 10 (0.9%) COMIRNATY recipients and 2 (0.2%) placebo recipients. In these analyses, 69.0% of study participants had at least 4 months of follow-up after Dose 2. In the analysis of blinded, placebo-controlled follow-up, there were no notable patterns between treatment groups for specific categories of serious adverse events (including neurologic, neuro-inflammatory, and thrombotic events) that would suggest a causal relationship to COMIRNATY. In the analysis of unblinded follow-up, there were no notable patterns of specific categories of serious adverse events that would suggest a causal relationship to COMIRNATY.

Single Dose (Original Monovalent) in Vaccine-Experienced Individuals 12 Years of Age and Older

16 Years of Age and Older

In Study 4, a double-blind placebo-controlled booster study, 5,081 participants 16 years of age and older recruited from Study 2 received a booster dose of COMIRNATY 10.8 months (median time, range of 5.0 to 12.6 months) after completing the primary series of COMIRNATY series and had a median follow-up time of 2.9 months based on data up to the cutoff date of February 8, 2022. The median age of participants who received COMIRNATY or placebo was 53.0 years (range 16 through 87 years of age), 49.1% were male and 50.9% were female, 79.0% were White, 14.9% were Hispanic/Latino, 9.2% were Black or African American, 5.5% were Asian, and 1.7% were American Indian/Alaska Native. 

Adverse reactions reported in participants receiving a booster dose of COMIRNATY were similar to those previously observed in participants receiving COMIRNATY as part of the primary series. Lymphadenopathy occurred in 141 (2.8%) participants who received a booster dose of COMIRNATY and in 83 (0.4%) participants who received COMIRNATY as a primary series.

18 Years Through 55 Years of Age

A subset of 306 Study 2 Phase 2/3 participants 18 through 55 years of age received a booster dose of COMIRNATY 6.8 months (median time, range 4.8 to 8.0 months) after completing the primary series. These participants had a median follow-up time of 8.3 months up to a data cutoff date of November 22, 2021. Among the 306 participants, the median age was 42 years (range 19 through 55 years of age), 45.8% were male and 54.2% were female, 81.4% were White, 27.8% were Hispanic/Latino, 9.2% were Black or African American, 5.2% were Asian, and 0.7% were American Indian/Alaska Native.

Adverse reactions reported in participants receiving a booster dose of COMIRNATY were similar to those previously observed in participants receiving COMIRNATY as part of the primary series. Lymphadenopathy occurred in 16 (5.2%) of participants who received a booster dose of COMIRNATY and 83 (0.4%) in participants who received COMIRNATY as a primary series.

12 Years Through 17 Years of Age

A subset of 65 Study 4 participants 12 through 17 years of age received a booster dose of COMIRNATY 13.3 months (median time, range 6.5 to 16.9 months) after completing the primary series and had a median follow-up time of 5.6 months up to a data cutoff date of July 14, 2022. The median age of participants was 14 years (range 12 through 17 years of age), 49.2% were male and 50.8% were female, 76.9% were White, 16.9% were Hispanic/Latino, 13.8% were Black or African American, 7.7% were Asian, and 1.5% were American Indian/Alaska Native. 

Adverse reactions reported in participants receiving a booster dose of COMIRNATY were similar to those previously observed in participants receiving COMIRNATY as part of the primary series. There were no cases of lymphadenopathy reported in participants who received a booster dose of COMIRNATY.

12 Years Through 15 Years of Age

A subset of 825 Study 2 Phase 2/3 participants 12 through 15 years of age received a booster dose of COMIRNATY 11.2 months (median time, range 6.3 to 20.1 months) after completing the primary series and had a median follow-up time of 9.5 months up to a data cutoff date of November 3, 2022. The median age of participants was 14.0 years (range 13 through 15 years of age), 49.3% were male and 50.7% were female, 83.5% were White, 10.8% were Hispanic/Latino, 4.6% were Black or African American, 7.5% were Asian, and 0.4% were American Indian/Alaska Native.

Adverse reactions reported in participants receiving a booster dose of COMIRNATY were similar to those previously observed in participants receiving COMIRNATY as part of the primary series. Lymphadenopathy occurred in 8 (1.0%) participants who received a booster dose of COMIRNATY and in 9 (0.8%) participants who received COMIRNATY as a primary series.

Single Dose (Bivalent Original and BA.4/BA.5) in Vaccine-Experienced Individuals 12 Years of Age and Older

A subset of 107 Study 5 Phase 2/3 participants 12 through 17 years of age, 313 participants 18 through 55 years of age and 306 participants 56 years of age and older previously vaccinated with a 2-dose primary series and 1 booster dose of COMIRNATY, went on to receive a second booster dose with Pfizer-BioNTech COVID-19 Vaccine, Bivalent.

Participants received a second booster dose 11.1 months (median time; range 5.4 to 16.9 months) after receiving the first booster dose and had a median follow-up time of 1.5 months up to a data cutoff date of October 31, 2022. The median age was 48.0 years, 42.7% were male, 57.3% were female, 80.6% were White, 11.4% were Hispanic/Latino, 5.9% were Asian, and 11.4% were Black or African American.

Local and Systemic Solicited Adverse Reactions

Table 9 and Table 10 present the frequency and severity of reported solicited local reactions and systemic reactions, respectively, within 7 days of a second booster dose of Pfizer-BioNTech COVID-19 Vaccine, Bivalent.

In participants 12 years of age and older who received a second booster dose, the mean duration of injection site pain was 2.1 to 2.4 days (range 1 to 11 days), injection site redness was 1.5 to 2.5 days (range 1 to 4 days), and injection site swelling was 1.3 to 1.9 days (range 1 to 4 days), respectively.

Table 9: Study 5 Frequency and Percentages of Participants With Solicited Local Reactions, by Maximum Severity, Within 7 Days After a Second Booster Dose Participants 12 Years of Age and Older Safety Population

Pfizer-BioNTech COVID-19 Vaccine, Bivalent*

12 Through 17 Years of Age
Na=107
nb (%)

18 Through 55 Years of Age
Na=309
nb (%)

56 Years of Age and Older
Na=300

  • nb (%)

Rednessc

Any (>2 cm)

6 (5.6)

21 (6.8%)

11 (3.7%)

Mild

4 (3.7)

16 (5.2%)

7 (2.3)

Moderate

2 (1.9)

5 (1.6)

4 (1.3%)

Severe

0

0

0

Swellingc

Any (>2 cm)

8 (7.5)

23 (7.4%)

8 (2.7)

Mild

6 (5.6)

19 (6.1%)

5 (1.7)

Moderate

2 (1.9)

4 (1.3)

3 (1.0)

Severe

0

0

0

Pain at the injection sited

Any

75 (70.1)

236 (76.1)

172 (57.1)

Mild

45 (42.1)

178 (57.4)

147 (48.8)

Moderate

29 (27.1)

58 (18.7)

24 (8.0)

Severe

1 (0.9)

0

1 (0.3)

Note: Adverse Reactions were collected in the electronic diary (e-diary) from day of vaccination (Day 1) through Day 7 after the study vaccination.
* Vaccine encoding the viral spike (S) glycoprotein of SARS-CoV-2 Wuhan-Hu-1 strain (Original) and Omicron variant lineages BA.4 and BA.5 (Omicron BA.4/BA.5).
N = 310 for redness and pain at injection site in participants 18 through 55 years of age; N = 301 for pain at injection site in participants 56 years of age and older.
N = Number of participants reporting at least 1 yes or no response for the specified reaction after the study vaccination.
n = Number of participants with the specified adverse reaction.
Mild: >2.0 to 0 cm; Moderate: >5.0 to 10.0 cm; Severe: >10.0 cm.
Mild: does not interfere with activity; Moderate: interferes with activity; Severe: prevents daily activity.

Table 10: Study 5 Frequency and Percentages of Participants With Solicited Systemic Adverse Reactions, by Maximum Severity, Within 7 Days After a Second Booster Dose Participants 12 Years of Age and Older Safety Population

Pfizer-BioNTech COVID-19 Vaccine, Bivalent*

12 Through 17 Years of Age
Na=107
nb (%)

18 Through 55 Years of Age
Na=309
nb (%)

56 Years of Age and Older
Na=300
nb (%)

Fever

≥38.0°C

10 (9.3)

15 (4.9)

14 (4.7)

≥38.0°C to 38.4°C

7 (6.5)

9 (2.9)

10 (3.3)

>38.4°C to 38.9°C

2 (1.9)

6 (1.9)

3 (1.0)

>38.9°C to 40.0°C

1 (0.9)

0

0

>40.0°C

0

0

0

Fatiguec

Any

72 (67.3)

189 (61.2)

116 (38.5)

Mild

27 (25.2)

83 (26.9)

56 (18.6)

Moderate

45 (42.1)

100 (32.4)

56 (18.6)

Severe

0

6 (1.9)

4 (1.3)

Headachec

Any

54 (50.5)

144 (46.6)

92 (30.7)

Mild

28 (26.2)

87 (28.2)

62 (20.7)

Moderate

26 (24.3)

55 (17.8)

30 (10.0)

Severe

0

2 (0.6)

0

Chillsc

Any

25 (23.4)

68 (22.0)

36 (12.0)

Mild

19 (17.8)

38 (12.3)

21 (7.0)

Moderate

6 (5.6)

28 (9.1)

14 (4.7)

Severe

0

2 (0.6)

1 (0.3)

Vomitingd

Any

3 (2.8)

6 (1.9)

2 (0.7)

Mild

3 (2.8)

5 (1.6)

2 (0.7)

Moderate

0

1 (0.3)

0

Severe

0

0

0

Diarrheae

Any

7 (6.5)

33 (10.7)

29 (9.6)

Mild

7 (6.5)

27 (8.7)

23 (7.6)

Moderate

0

5 (1.6)

6 (2.0)

Severe

0

1 (0.3)

0

New or worsened muscle painc

Any

28 (26.2)

94 (30.4)

54 (18.0)

Mild

12 (11.2)

47 (15.2)

30 (10.0)

Moderate

16 (15.0)

47 (15.2)

24 (8.0)

Severe

0

0

0

New or worsened joint painc

Any

13 (12.1)

46 (14.9)

36 (12.0)

Mild

9 (8.4)

21 (6.8)

20 (6.7)

Moderate

4 (3.7)

25 (8.1)

16 (5.3)

Severe

0

0

0

Use of antipyretic or pain medicationf

36 (33.6)

105 (34.0)

74 (24.7)

Note: Adverse reactions and use of antipyretic or pain medication were collected in the electronic diary (e-diary) from day of vaccination (Day 1) through Day 7 after the study vaccination.
* Vaccine encoding the viral spike (S) glycoprotein of SARS-CoV-2 Wuhan-Hu-1 strain (Original) and Omicron variant lineages BA.4 and BA.5 (Omicron BA.4/BA.5).
N = 301 for fever, fatigue and diarrhea in participants 56 years of age and older.
N = Number of participants reporting at least 1 yes or no response for the specified adverse reaction after the study vaccination.
n = Number of participants with the specified adverse reaction.
Mild: does not interfere with activity; Moderate: some interference with activity; Severe: prevents daily activity.
Mild: 1 to 2 times in 24 hours; Moderate: >2 times in 24 hours; Severe: requires intravenous hydration.
Mild: 2 to 3 loose stools in 24 hours; Moderate: 4 to 5 loose stools in 24 hours; Severe: 6 or more loose stools in 24 hours.
Severity was not collected for use of antipyretic or pain medication.

Unsolicited Adverse Events

Among participants 12 years of age and older, unsolicited adverse events were reported by 48 (6.6%) participants who received a second booster dose through 1 month after the booster dose. Lymphadenopathy occurred in 7 (1.0%) participants.

Concomitant Administration of COMIRNATY (Original Monovalent) With Influenza Vaccine in Adults 18 Years Through 64 Years of Age

In Study 8, a Phase 3 study, participants 18 through 64 years of age who received COMIRNATY concomitantly administered with Influenza Vaccine (Afluria Quadrivalent) followed 1 month later by saline placebo (n = 564) were compared to participants who received influenza vaccine with saline placebo followed 1 month later by COMIRNATY (n = 564).

Demographic characteristics in Study 8 among the participants in the concomitant administration and separate administration groups were similar with regard to age, sex, race, and ethnicity. Among the 564 participants in the concomitant administration group, the median age was 39.0 years (range 18 through 64 years of age), 36.9% were male and 63.1% were female, 79.1% were White, 12.9% were Asian, and 0.9% were Hispanic/Latino.

Solicited local and systemic adverse reactions were reported more frequently by participants who received COMIRNATY concomitantly with influenza vaccine, compared to participants who received COMIRNATY alone. The most common adverse reactions reported in the concomitant administration group and after COMIRNATY alone were injection site pain (COMIRNATY injection site) (86.2% and 84.4%, respectively), fatigue (64.0% and 50.8%, respectively), and headache (47.2% and 37.8%, respectively).

Children 5 Years Through 11 Years of Age

Two-Dose Series (Original Monovalent) in Vaccine-Naïve Children 5 Years Through 11 Years of Age

Study 3 is a Phase 1/2/3 multicenter, randomized, dose-finding, open label (Phase 1) and multinational, placebo controlled (saline placebo), observer-blind, immunogenicity and efficacy (Phase 2/3) study that has evaluated 4,695 participants 5 through 11 years of age, of whom 3,109 participants received COMIRNATY and 1,538 participants received placebo in Phase 2/3.

Demographic characteristics were generally similar with regard to age, sex, race, and ethnicity among participants who received COMIRNATY and those who received placebo. Overall, among the 4,647 participants who received at least 1 dose of COMIRNATY or placebo, 51.4% were male and 48.6% were female, 77.5% were White, 6.0% were Black or African American, 17.0% were Hispanic/Latino, 8.1% were Asian, and 0.4% were American Indian/Alaska Native.

In an analysis of Study 3 (Phase 2/3), 4,632 participants 5 through 11 years of age who received a 2-dose primary series [3,100 COMIRNATY; 1,532 placebo] have been followed a median of 1.9 months (range 0.1 to 7.5 months) after the second dose in the blinded placebo-controlled follow-up period up to the cutoff date of May 20, 2022.

In Study 3, participants 5 years through 11 years of age in the reactogenicity subset were monitored using an electronic diary for solicited local and systemic adverse reactions and use of antipyretic medication after each vaccination. Participants were also monitored for unsolicited adverse events throughout the study (from Dose 1 through 1 month [all unsolicited adverse events] or through 6 months [serious adverse events] after the last vaccination). Tables 11 through 12 present the frequency and severity of solicited local and systemic reactions, respectively, within 7 days following Dose 1 or Dose 2 of COMIRNATY.

Solicited Local and Systemic Adverse Reactions

The mean duration of pain at the injection site after Dose 2 was 2.3 days (range 1 to 37 days), for redness 2.0 days (range 1 to 10 days), and for swelling 2.2 days (range 1 to 16 days) for children in the COMIRNATY group in the blinded placebo-controlled follow-up period up to the cutoff date of May 20, 2022.

Table 11: Study 3 Frequency and Percentages of Participants With Solicited Local Reactions, by Maximum Severity, Within 7 Days After Each Dose Children 5 Through 11 Years of Age Safety Population*

COMIRNATY±
Dose 1

Na=3096
nb (%)

Placebo
Dose 1
Na=1531 to 1532
nb (%)

COMIRNATY±
Dose 2

Na=3064
nb (%)

Placebo
Dose 2
Na=1521 to 1522
nb (%)

Rednessc

Any (≥0.5 cm)

434 (14.0)

91 (5.9)

575 (18.8)

79 (5.2)

Mild

287 (9.3)

78 (5.1)

315 (10.3)

57 (3.7)

Moderate

146 (4.7)

11 (0.7)

257 (8.4)

20 (1.3)

Severe

1 (0.0)

2 (0.1)

3 (0.1)

2 (0.1)

Swellingc

Any (≥0.5 cm)

320 (10.3)

46 (3.0)

450 (14.7)

41 (2.7)

Mild

177 (5.7)

28 (1.8)

247 (8.1)

30 (2.0)

Moderate

142 (4.6)

18 (1.2)

203 (6.6)

11 (0.7)

Severe

1 (0.0)

0

0

0

Pain at the injection sited

Any

2258 (72.9)

482 (31.5)

2181 (71.2)

434 (28.5)

Mild

1810 (58.5)

434 (28.3)

1642 (53.6)

389 (25.6)

Moderate

442 (14.3)

48 (3.1)

533 (17.4)

44 (2.9)

Severe

6 (0.2)

0

6 (0.2)

1 (0.1)

Note: Reactions were collected in an electronic diary (e-diary) from Day 1 to Day 7 after vaccination.
N = Number of participants reporting at least 1 yes or no response for the specified reaction after the specified dose.
n = Number of participants with the specified reaction.
Mild: ≥0.5 to <2.0 cm; Moderate: >2.0 to <7.0 cm; Severe: >7.0 cm.
Mild: does not interfere with activity; Moderate: interferes with activity; Severe: prevents daily activity.
* Randomized participants who received at least 1 dose of the study intervention.
± Vaccine encoding the viral spike (S) glycoprotein of SARS-CoV-2 Wuhan-Hu-1 strain (Original).

Table 12: Study 3 Frequency and Percentages of Participants With Solicited Systemic Reactions, by Maximum Severity, Within 7 Days After Each Dose Children 5 Through 11 Years of Age Safety Population*

COMIRNATY±
Dose 1

Na=3096
nb (%)

Placebo
Dose 1
Na=1531 to 1532
nb (%)

COMIRNATY±
Dose 2

Na=3064
nb (%)

Placebo
Dose 2
Na=1521 to 1522
nb (%)

Fever

≥38.0°C

64 (2.1)

21 (1.4)

193 (6.3)

21 (1.4)

≥38.0°C to 38.4°C

37 (1.2)

10 (0.7)

101 (3.3)

13 (0.9)

>38.4°C to 38.9°C

22 (0.7)

9 (0.6)

70 (2.3)

5 (0.3)

>38.9°C to 40.0°C

4 (0.1)

2 (0.1)

21 (0.7)

3 (0.2)

>40.0°C

1 (0.0)

0

1 (0.0)

0

Fatiguec

Any

1067 (34.5)

496 (32.4)

1200 (39.2)

383 (25.2)

Mild

702 (22.7)

323 (21.1)

665 (21.7)

230 (15.1)

Moderate

360 (11.6)

171 (11.2)

508 (16.6)

149 (9.8)

Severe

5 (0.2)

2 (0.1)

27 (0.9)

4 (0.3)

Headachec

Any

703 (22.7)

372 (24.3)

870 (28.4)

284 (18.7)

Mild

530 (17.1)

275 (18.0)

576 (18.8)

201 (13.2)

Moderate

170 (5.5)

91 (5.9)

286 (9.3)

82 (5.4)

Severe

3 (0.1)

6 (0.4)

8 (0.3)

1 (0.1)

Chillsc

Any

174 (5.6)

84 (5.5)

301 (9.8)

66 (4.3)

Mild

138 (4.5)

69 (4.5)

205 (6.7)

52 (3.4)

Moderate

36 (1.2)

15 (1.0)

94 (3.1)

13 (0.9)

Severe

0

0

2 (0.1)

1 (0.1)

Vomitingd

Any

63 (2.0)

30 (2.0)

62 (2.0)

27 (1.8)

Mild

52 (1.7)

28 (1.8)

56 (1.8)

22 (1.4)

Moderate

11 (0.4)

2 (0.1)

5 (0.2)

5 (0.3)

Severe

0

0

1 (0.0)

0

Diarrheae

Any

198 (6.4)

75 (4.9)

166 (5.4)

76 (5.0)

Mild

184 (5.9)

72 (4.7)

149 (4.9)

70 (4.6)

Moderate

14 (0.5)

3 (0.2)

15 (0.5)

6 (0.4)

Severe

0

0

2 (0.1)

0

New or worsened muscle painc

Any

289 (9.3)

126 (8.2)

368 (12.0)

104 (6.8)

Mild

206 (6.7)

96 (6.3)

245 (8.0)

68 (4.5)

Moderate

82 (2.6)

30 (2.0)

122 (4.0)

36 (2.4)

Severe

1 (0.0)

0

1 (0.0)

0

New or worsened joint painc

Any

106 (3.4)

70 (4.6)

159 (5.2)

57 (3.7)

Mild

71 (2.3)

56 (3.7)

103 (3.4)

42 (2.8)

Moderate

35 (1.1)

14 (0.9)

56 (1.8)

15 (1.0)

Severe

0

0

0

0

Use of antipyretic or pain medicationf

436 (14.1)

135 (8.8)

601 (19.6)

111 (7.3)

Note: Events and use of antipyretic or pain medication were collected in an electronic diary (e-diary) from Day 1 to Day 7 after each dose.
N = Number of participants reporting at least 1 yes or no response for the specified event after the specified dose.
n = Number of participants with the specified reaction.
Mild: does not interfere with activity; Moderate: some interference with activity; Severe: prevents daily activity.
Mild: 1 to 2 times in 24 hours; Moderate: >2 times in 24 hours; Severe: requires intravenous hydration.
Mild: 2 to 3 loose stools in 24 hours; Moderate: 4 to 5 loose stools in 24 hours; Severe: 6 or more loose stools in 24 hours.
Severity was not collected for use of antipyretic or pain medication.
* Randomized participants who received at least 1 dose of the study intervention.
± Vaccine encoding the viral spike (S) glycoprotein of SARS-CoV-2 Wuhan-Hu-1 strain (Original).

Unsolicited Adverse Events

In the following analyses of Study 3 in participants 5 through 11 years of age, 3,109 participants received COMIRNATY and 1,538 participants received placebo. Among those who received 2 doses of COMIRNATY or placebo, 1,185 participants in the COMIRNATY group and 575 participants in the placebo group had follow- up time ≥4 to <6 months and 296 participants in the COMIRNATY group and 150 participants in the placebo group had follow-up time of >6 months in the blinded placebo-controlled follow-up period.

Among participants who received at least 1 dose of study vaccine, unsolicited adverse events were reported by 333 (10.7%) participants in the COMIRNATY group and 150 (9.8%) participants in the placebo group.

In an analysis of all unsolicited adverse events reported following administration of Dose 1 to one month after administration of Dose 2, the adverse reactions (excluding reactions reported as solicited adverse reactions) in participants who received COMIRNATY compared with participants who received placebo were lymphadenopathy (n=23; 0.7% vs. n=4; 0.3%), nausea (n=7; 0.2% vs. n=3; 0.2%), decreased appetite (n=3; 0.1% vs. n=2; 0.1%), malaise (n=2; 0.1% vs. n=0), and night sweats (n=1; 0.0% vs. n=0).

Serious Adverse Events

Serious adverse events, from administration of Dose 1 to the participant unblinding date, were reported in 8 (0.3%) COMIRNATY recipients and in 2 (0.1%) placebo recipients. No serious adverse events were considered related to vaccination.

Single Dose (Original Monovalent) in Vaccine-Experienced Children 5 Years Through 11 Years of Age

In Phase 2/3 of Study 3, 2,408 participants 5 years through 11 years of age received a first booster dose of COMIRNATY at a median of 7.9 months (range 5.3 to 19.4 months) after completing the primary series. These participants had a median safety follow-up of 6.4 months from vaccination through the data cutoff date of February 28, 2023. The median age was 8.0 years (range 5 through 11 years of age), 50.5% were male and 49.5% were female, 76.3% were White, 5.9% were Black or African American, 16.9% were Hispanic/Latino, 8.2% were Asian, and 0.5% were American Indian/Alaska Native.

Solicited Local and Systemic Adverse Reactions

The frequency of solicited adverse reactions reported in participants receiving a booster dose of COMIRNATY were generally consistent with those reported in pediatric participants receiving COMIRNATY as part of the two-dose series.

Unsolicited Adverse Events

Lymphadenopathy occurred in 46 (1.9%) participants who received a booster dose of COMIRNATY and in 23 (0.7%) participants who received COMIRNATY as a primary series.

Serious Adverse Events

Serious adverse events from study vaccination through 6 months after study vaccination were reported by 10 (0.4%) COMIRNATY recipients. No serious adverse events were considered related to vaccination.

Single Dose (Bivalent Original and BA.4/BA.5) in Vaccine-Experienced Children 5 Years Through 11 Years of Age

In Study 6, 113 participants 5 years through 11 years of age previously vaccinated with a 2-dose primary series and 1 booster dose of COMIRNATY received a second booster (fourth dose) with Pfizer-BioNTech COVID-19 Vaccine, Bivalent (Original and Omicron BA.4/BA.5). Participants received a second booster with Pfizer- BioNTech COVID-19, Bivalent 2.6 to 8.5 months after receiving their third dose with COMIRNATY and had a median follow-up time of 6.3 months (range 1.1 to 6.8 months) up to a data cutoff date of April 20, 2023. The median age of participants was 9 years (range 5 through 11 years of age), 50.4% were male and 49.6% were female, 58.4% were White, 20.4% were Hispanic/Latino, 19.5% were multiracial, 11.5% were Asian, and 8.0% were Black or African American.

Solicited Local and Systemic Adverse Reactions

The frequency of solicited adverse reactions reported in participants receiving a second booster dose of Pfizer- BioNTech COVID-19 Vaccine, Bivalent (Original and BA.4/BA.5) were generally consistent with those reported in pediatric participants receiving COMIRNATY.

Unsolicited Adverse Events

Lymphadenopathy was reported in 1 (0.9%) participant who received Pfizer-BioNTech COVID-19 Vaccine, Bivalent (Original and BA.4/BA.5).

Serious Adverse Events

No serious adverse events were reported.

Single Dose (Monovalent XBB.1.5) in Vaccine-Naïve Children 5 Years Through 11 Years of Age

In a subset of Study 6, the safety of a single dose of COMIRNATY (encoding the viral spike (S) glycoprotein of SARS-CoV-2 Omicron XBB.1.5) was evaluated in 310 COVID-19 vaccine-naïve participants 5 through 11 years of age. Participants had a median follow-up time of 6.4 months (range 1.7 to 6.9 months). The median age of participants was 7.0 years (range 5 through 11 years of age), 47.1% were male and 52.9% were female, 41.3% were White, 52.9% were Black or African American, 52.3% were Hispanic or Latino, 1.9% were Asian, and 0.3% were American Indian/Alaska Native.

Solicited Local and Systemic Adverse Reactions

The frequency of solicited adverse reactions reported in participants who received a single dose of COMIRNATY, monovalent (XBB.1.5) were generally consistent with those previously reported by participants receiving COMIRNATY.

Unsolicited Adverse Events

In an analysis of all unsolicited adverse events through 1 month after study vaccination, unsolicited adverse events were reported by 11 (3.5%) COMIRNATY recipients. The adverse reaction not already captured by solicited local and systemic reactions was decreased appetite (n=1; 0.3%).

Serious Adverse Events

Serious adverse events from study vaccination through 6 months after study vaccination were reported by 3 (1.0%) COMIRNATY recipients. No serious adverse events were considered related to vaccination.

Postmarketing Experience

The following adverse reactions have been identified during postmarketing use of COMIRNATY, Pfizer-BioNTech COVID-19 Vaccine and Pfizer-BioNTech COVID-19 Vaccine, Bivalent. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to vaccine exposure.

Cardiac disorders: myocarditis, pericarditis Gastrointestinal disorders: diarrhea, vomiting

Immune system disorders: severe allergic reactions, including anaphylaxis, and other hypersensitivity reactions (e.g., rash, pruritus, urticaria, angioedema)

Musculoskeletal and connective tissue disorders: pain in extremity (arm)

Nervous system disorders: syncope, dizziness, febrile seizures (in children 5 through 11 years of age)

Cardiovascular Outcomes in Patients Diagnosed With mRNA COVID-19 Vaccine-associated Myocarditis

In a longitudinal retrospective observational cohort study across 38 hospitals in the U.S., information on cardiovascular outcomes was collected on 333 patients 5 through 29 years of age who had been diagnosed with COVID-19 vaccine-associated myocarditis. Among these patients, 322 were confirmed to have received an mRNA COVID-19 vaccine encoding the S glycoprotein of the Original SARS-CoV-2. Of 331 patients, 278 had onset of symptoms following the second dose of a primary series, 33 following the first dose of a primary series, and 20 following a first booster dose1.

Among 307 patients who had been diagnosed with COVID-19 vaccine-associated myocarditis for whom follow-up information was available, 89 reported cardiac symptoms at a median follow-up of 91 days (interquartile range 25-186 days) post-vaccination1.

Initial gadolinium-enhanced cardiac magnetic resonance imaging (CMR) was performed on 216 patients, of whom 177 had late gadolinium enhancement (LGE), a marker of myocardial injury. Among 161 patients who had LGE on initial CMR and who had a follow-up gadolinium-enhanced CMR at a median follow-up of 159 days (interquartile range 78-253 days), 98 had persistence of LGE. Overall, the severity of LGE decreased during follow-up. The clinical and prognostic significance of these CMR findings is not known1.

Limitations of this study include potential selection bias towards patients with more severe myocarditis who are more likely to be hospitalized and have CMR, variability in diagnostic testing, and variability in follow-up1.

Drug Interactions for Comirnaty

No information provided.

Warnings for Comirnaty

Included as part of the PRECAUTIONS section.

Precautions for Comirnaty

Management Of Acute Allergic Reactions

Appropriate medical treatment must be immediately available to manage potential anaphylactic reactions following administration of COMIRNATY.

Myocarditis And Pericarditis

Postmarketing data with authorized or approved mRNA COVID-19 vaccines demonstrate increased risks of myocarditis and pericarditis, particularly within the first week following vaccination. For COMIRNATY, the observed risk is highest in males 12 through 17 years of age. Although some cases required intensive care support, available data from short-term follow-up suggest that most individuals have had resolution of symptoms with conservative management. Information is not yet available about potential long-term sequelae.

The Centers for Disease Control and Prevention (CDC) has published considerations related to myocarditis and pericarditis after vaccination, including for vaccination of individuals with a history of myocarditis or pericarditis (https://www.cdc.gov/vaccines/covid-19/clinical-considerations/myocarditis.html).

Syncope

Syncope (fainting) may occur in association with administration of injectable vaccines, including COMIRNATY. Procedures should be in place to avoid injury from fainting.

Altered Immunocompetence

Immunocompromised persons, including individuals receiving immunosuppressant therapy, may have a diminished immune response to COMIRNATY [see Use In Specific Populations].

Limitation Of Effectiveness

COMIRNATY may not protect all vaccine recipients.

Patient Counseling Information

Advise the vaccine recipient or caregiver to read the FDA-approved patient labeling.

Inform the vaccine recipient or caregiver of the potential benefits and risks of vaccination with COMIRNATY.

Advise the vaccine recipient or caregiver to report any adverse events to their healthcare provider or to the Vaccine Adverse Event Reporting System at 1-800-822-7967 and www.vaers.hhs.gov.

This product’s labeling may have been updated. For the most recent prescribing information, please visit https://dailymed.nlm.nih.gov/dailymed/.

Nonclinical Toxicology

Carcinogenesis, Mutagenesis, Impairment Of Fertility

COMIRNATY has not been evaluated for the potential to cause carcinogenicity, genotoxicity, or impairment of male fertility. In a developmental toxicity study in rats with COMIRNATY [encoding the viral spike (S) glycoprotein of SARS-CoV-2 Wuhan-Hu 1 strain (Original)] there were no vaccine-related effects on female fertility [see Use In Specific Populations].

Use In Specific Populations

Pregnancy

Risk Summary

All pregnancies have a risk of birth defect, loss, or other adverse outcomes. In the US general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively. Available data on COMIRNATY administered to pregnant women are insufficient to inform vaccine-associated risks in pregnancy.

A developmental toxicity study has been performed in female rats administered the equivalent of a single human dose of COMIRNATY [encoding the viral spike (S) glycoprotein of SARS-CoV-2 Wuhan-Hu 1 strain (Original)] on 4 occasions, twice prior to mating and twice during gestation. These studies revealed no evidence of harm to the fetus due to the vaccine (see Animal Data).

Clinical Considerations

Disease-Associated Maternal And/Or Embryo/Fetal Risk

Pregnant individuals infected with SARS-CoV-2 are at increased risk of severe COVID-19 compared with non-pregnant individuals.

Data

Animal Data

In a developmental toxicity study, 0.06 mL of a vaccine formulation containing the same quantity of nucleoside-modified messenger ribonucleic acid (mRNA) (30 mcg) and other ingredients included in a single human dose of COMIRNATY [encoding the viral spike (S) glycoprotein of SARS-CoV-2 Wuhan-Hu 1 strain (Original)] was administered to female rats by the intramuscular route on 4 occasions: 21 and 14 days prior to mating, and on gestation days 9 and 20. No vaccine-related adverse effects on female fertility, fetal development, or postnatal development were reported in the study.

Lactation

Risk Summary

It is not known whether COMIRNATY is excreted in human milk. Data are not available to assess the effects of COMIRNATY on the breastfed infant or on milk production/excretion. The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for COMIRNATY and any potential adverse effects on the breastfed child from COMIRNATY or from the underlying maternal condition. For preventive vaccines, the underlying maternal condition is susceptibility to disease prevented by the vaccine.

Pediatric Use

Safety and effectiveness of COMIRNATY in individuals 12 through 17 years of age is based on safety and effectiveness data in this age group and in adults [see ADVERSE REACTIONS and Clinical Studies].

The safety and effectiveness of COMIRNATY in individuals younger than 12 years of age have not been established. Evidence from clinical studies in individuals 6 months through 4 years of age strongly suggests that a single dose of COMIRNATY would be ineffective in individuals younger than 6 months of age.

Geriatric Use

Of the total number of COMIRNATY recipients in Study 2 as of March 13, 2021 (N = 22,026), 20.7% (n = 4,552) were 65 years of age and older and 4.2% (n = 925) were 75 years of age and older [see Clinical Studies]. In Study 4, of 5081 recipients who received COMIRNATY as the first booster dose, 23.1% (n = 1175) were 65 years of age and older and 5.2% (n = 265) were 75 years of age and older. In Study 5, of 726 recipients who received Pfizer-BioNTech COVID-19 Vaccine, Bivalent as the second booster dose, 21.9% (n = 159) were 65 years of age and older and 4.8% (n = 35) were 75 years of age and older. No overall differences in safety or effectiveness were observed between these recipients and younger recipients.

Immunocompromised Individuals

The Centers for Disease Control and Prevention has published considerations related to COVID-19 vaccination for individuals who are moderately to severely immunocompromised (https://www.cdc.gov/vaccines/covid-19/clinical-considerations/covid-19-vaccines-us.html).

OVERDOSES

No information provided.

Contraindications for Comirnaty

Do not administer COMIRNATY to individuals with known history of a severe allergic reaction (e.g., anaphylaxis) to any component of COMIRNATY [see Description (11)] or to individuals who had a severe allergic reaction (e.g., anaphylaxis) following a previous dose of a Pfizer-BioNTech COVID-19 vaccine.

Clinical Pharmacology for Comirnaty

Mechanism Of Action

The nucleoside-modified mRNA in COMIRNATY is formulated in lipid particles, which enable delivery of the mRNA into host cells to allow expression of the SARS-CoV-2 S antigen. The vaccine elicits an immune response to the S antigen, which protects against COVID-19.

Patient Information for Comirnaty

Advise the vaccine recipient or caregiver to read the FDA-approved patient labeling.

Inform the vaccine recipient or caregiver of the potential benefits and risks of vaccination with COMIRNATY.

Advise the vaccine recipient or caregiver to report any adverse events to their healthcare provider or to the Vaccine Adverse Event Reporting System at 1-800-822-7967 and www.vaers.hhs.gov.

This product’s labeling may have been updated. For the most recent prescribing information, please visit https://dailymed.nlm.nih.gov/dailymed/.

Manufactured for:

BioNTech Manufacturing GmbH
An der Goldgrube 12
55131 Mainz, Germany

Manufactured by:
Pfizer Inc., New York, NY 10001
LAB-1490-15.0
US Govt. License No. 2229

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