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7 At the time of the analysis of the ongoing Study 2 with a data cut-off of March 13, 2021, there were
25,651 (58.2%) participants (13,031 COMIRNATY and 12,620 placebo) 16 years of age and older followed for
≥4 months after the second dose.
Participants 16 years and older in the reactogenicity subset were monitored for solicited local and systemic
reactions and use of antipyretic medication after each vaccination in an electronic diary. Participants are being
monitored for unsolicited adverse events, including serious adverse events, throughout the study [from Dose 1 through 1 month (all unsolicited adverse events) or 6 months (serious adverse events) after the last vaccination]. Demographic characterist ics in Study 2 were generally similar with regard to age, gender, 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 Adverse Reactions Solicited in the Study 2
Table 1 and Table 2 present the frequency and severity of reported solicited local and systemic reactions,
respectively, within 7 days following each dose of COMIRNATY and placebo in the subset of participants
16 through 55 years of age included in the safety population who were monitored for reactogenicity with an
electronic diary.
Table 3 and Table 4 present the frequency and severity of reported solicited local and systemic reactions,
respectively, within 7 days of each dose of COMIRNATY and placebo for participants 56 years of age and
older.
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 1: 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
FDA-CBER-2021-5683-0651745
8 COMIRNATY
Dose 1
Na=2899
nb (%) Placebo
Dose 1
Na=2908
nb (%) COMIRNATY
Dose 2
Na=2682
nb (%) Placebo
Dose 2
Na=2684
nb (%)
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
a N = Number of participants reporting at least 1 yes or no response for the specified reaction after the specified dose The N for
each reaction was the same, therefore, this information was included in the column header
b n = Number of participants with the specified reaction
c Mild: >2 0 to ≤5 0 cm; Moderate: >5 0 to ≤100 cm; Severe: >10 0 cm
d Mild: does not interfere with activity; Moderate: interferes with activity; Severe: prevents daily activity
Table 2: 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℃ 119 (4.1) 25 (0.9) 440 (16.4) 11 (0.4)
≥38.0℃ to 38.4℃ 86 (3.0) 16 (0.6) 254 (9.5) 5 (0.2)
>38.4℃ to 38.9℃ 25 (0.9) 5 (0.2) 146 (5.4) 4 (0.1)
>38.9℃ to 40.0℃ 8 (0.3) 4 (0.1) 39 (1.5) 2 (0.1)
>40.0℃ 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)
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9 COMIRNATY
Dose 1
Na=2899
nb (%) Placebo
Dose 1
Na=2908
nb (%) COMIRNATY
Dose 2
Na=2682
nb (%) Placebo
Dose 2
Na=2684
nb (%)
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
a N = Number of participants reporting at least 1 yes or no response for the specified reaction after the specified dose The N for
each reaction or use of antipyretic or pain medication was the same, therefore, this information was included in the column
header
b n = Number of participants with the specified reaction
c Mild: does not interfere with activity; Moderate: some interference with activity; Severe: prevents daily activity
d Mild: 1 to 2 times in 24 hours; Moderate: >2 times in 24 hours; Severe: requires intravenous hydration
e 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
f Severity was not collected for use of antipyretic or pain medication
FDA-CBER-2021-5683-0651747
10 Table 3: 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
a N = Number of participants reporting at least 1 yes or no response for the specified reaction after the specified dose The N for
each reaction was the same, therefore, the information was included in the column header
b n = Number of participants with the specified reaction
c Mild: >2 0 to ≤5 0 cm; Moderate: >5 0 to ≤100 cm; Severe: >10 0 cm
d 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 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℃ 26 (1.3) 8 (0.4) 219 (11.8) 4 (0.2)
≥38.0℃ to 38.4℃ 23 (1.1) 3 (0.2) 158 (8.5) 2 (0.1)
>38.4℃ to 38.9℃ 2 (0.1) 3 (0.2) 54 (2.9) 1 (0.1)
>38.9℃ to 40.0℃ 1 (0.0) 2 (0.1) 7 (0.4) 1 (0.1)
>40.0℃ 0 0 0 0
FDA-CBER-2021-5683-0651748
11 COMIRNATY
Dose 1
Na=2008
nb (%) Placebo
Dose 1
Na=1989
nb (%) COMIRNATY
Dose 2
Na=1860
nb (%) Placebo
Dose 2
Na=1833
nb (%)
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
a N = Number of participants reporting at least 1 yes or no response for the specified reaction after the specified dose N for each
reaction or use of antipyretic or pain medication was the same, therefore was included in the column header
b n = Number of participants with the specified reaction
FDA-CBER-2021-5683-0651749
20 SARS-CoV-2 infection (Table 76) as the COVID -19 case counts in participants without prior SARS-CoV-2
infection were the same as those in participants with or without prior SARS-CoV-2 infection in both the
COMIRNATY and placebo groups.
Table 67: Vaccine Efficacy – First Severe COVID-19 Occurrence in Participants 16 Years of Age and
Older With or Without* Prior SARS- CoV-2 Infection Based on Protocol† or Centers for
Disease Control and Prevention (CDC)‡ Definition From 7 Days After Dose 2 – Evaluable
Efficacy (7 Days) Population During the Placebo -Controlled Follow- up
Vaccine Efficacy – First Severe COVID -19 Occurrence
COMIRNATY
Cases
n1a
Surveillance Timeb (n2c) Placebo
Cases
n1a
Surveillance Timeb (n2c) Vaccine Efficacy %
(95% CId)
7 days after Dose 2d 1
6.353 (20 ,540) 21
6.237 (20 ,629) 95.3
(70.9, 99.9)
Vaccine Efficacy – First Severe COVID -19 Occurrence Based on CDC Definition
COMIRNATY
Cases
n1a
Surveillance Timeb (n2c) Placebo
Cases
n1a
Surveillance Timeb (n2c) Vaccine Efficacy %
(95% CId)
7 days after Dose 2d 0
6.345 (20,513) 31
6.225 (20,593) 100
(87.6, 100.0)
Note: Confirmed cases were determined by Reverse Transcription -Polymerase Chain Reaction (RT -PCR) and at least 1 symptom
consistent with COVID -19 (symptoms included: fever; new or increased cough; new or increased shortness of breath; chills; new or
increased muscle pain; new loss of taste or smell; sore throat; diarrhea; vomiting)
* Participants who had no evidence of past SARS -CoV-2 infection (ie, N -binding antibody [serum] negative at Visit 1 and
SARS-CoV-2 not detected by NAAT [nasal swab] at Visits 1 and 2), and had negative NAAT (nasal swab) at any unscheduled visit
prior to 7 days after Dose 2 were included in the analysis
† Severe illness from COVID -19 is defined in the protocol as confirmed COVID -19 and presence of at least 1 of the following:
• Clinical signs at rest indicative of severe systemic illness (respiratory rate ≥30 breaths per minute, heart rate ≥125 beats per
minute, saturation of oxygen ≤93% on room air at sea level, or ratio of arteri al oxygen partial pressure to fractional inspired
oxygen <300 mm Hg);
• Respiratory failure [defined as needing high -flow oxygen, noninvasive ventilation, mechanical ventilation or extracorporeal
membrane oxygenation (ECMO)];
• Evidence of shock (systolic blood pressure <90 mm Hg, diastolic blood pressure <60 mm Hg, or requiring vasopressors);
• Significant acute renal, hepatic, or neurologic dysfunction;
• Admission to an Intensive Care Unit;
• Death
‡ Severe illness from COVID -19 as defined by CDC is confirmed COVID -19 and presence of at least 1 of the following:
• Hospitalization;
• Admission to the Intensive Care Unit;
• Intubation or mechanical ventilation;
• Death
a n1 = Number of participants meeting the endpoint definition
b Total surveillance time in 1000 person -ye ars for the given endpoint across all participants within each group at risk for the endpoint
Time period for COVID -19 case accrual is from 7 days after Dose 2 to the end of the surveillance period
c n2 = Number of participants at risk for the endpoint
d Two-s ide c onfidence interval (CI) for vaccine efficacy is derived based on the Clopper and Pearson method adjusted to the
surveillance time
Immunogenicity in Solid Organ Transplant Recipients
From an independent report (Kamar N, Abravanel F, Marion O, et al. Three doses of an mRNA Covid-19
vaccine in solid -organ transplant recipients. N Engl J Med) , a single arm study has been conducted in
FDA-CBER-2021-5683-0651758