125742 45 S211 M1 priority review request

Pfizer Documents (PHMPT/FDA)

Pfizer Bla Submission

Pfizer 12 15 Documents

13

Document text

BNT162b2
1.2 Request for Priority Review
CONFIDENTIAL
Page 1REQUEST FOR PRIORITY REVIEW
COVID -19 Vaccine (BNT162, PF -07302048)
sBLA 125742/45
DECEMBER 2021
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Page 2TABLE OF CONTENTS
LIST OF FIGURES ................................ ................................ ................................ ................... 2
ABBREVIAT IONS ................................ ................................ ................................ ................... 3
1. OVERVIEW ................................ ................................ ................................ .......................... 4
1.1. Rationale for Priority Review ................................ ................................ .................... 4
1.2. Serious and L ife-threatening Disease ................................ ................................ ........ 4
1.2.1. Background and Clinical Presentation of COVID -19 ................................ ..4
1.2.2. I ncidence and Prevalence of COVID-19 ................................ ...................... 5
1.3. Unmet Medical Need ................................ ................................ ................................ 6
1.4. Significant Improvement in Safety and Effectiveness through P revention of 
COVID -19 Disease ................................ ................................ ................................ ......6
1.4.1. Overview of Immunogenicity ................................ ................................ .......6
1.4.2. Overview of Efficacy  –Updated Anal ysis................................ ................... 7
1.4.3. Overview of Safety................................ ................................ ....................... 7
1.4.4. Overview of Supportive Real World and Post -Authorization Data 
Following Use of BNT162 b2 in Children 12 -15 Years of Age ......................... 8
1.4.5. Overview of Post- authorization Safety  Data ................................ ................ 9
1.5. Conclusions ................................ ................................ ................................ ............. 10
2. REFERENCES ................................ ................................ ................................ .................... 12
LIST OF FIGURES
Figure 1 Trends in Total Deaths in The United States Reported to CDC................. 5
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Page 3ABBREVIATIONS
Abbreviation Definition
AE adverse event
BLA Biologics License Application
CDC Centers for Disease Control and Prevention
CFR case fatality rates
CI confidence interval
COVID -19 Coronavirus Disease 2019
CSR Clinical Study Report
EUA Emergency Use Authorization
FDA (US) Food and Drug Administration 
GMFR geometric mean -fold rise
GMT geometric mean titer
ICU intensive care unit
IM intramuscular(ly)
IND Investigational New Drug 
IQR interquartile range
SAE serious adverse event
SARS -CoV-2 severe acute respiratory syndrome Coronavirus -2; virus causing the disease COVID -19
sBLA supplemental Biologics License Application
SOC System  Organ Class
US United States
VAERS Vaccine Adverse Event Reporting System
VE vaccine efficacy
VOC Variant of Concern
VOI Variant of Interest
WHO World Health Organization
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Page 41. OVE RVIEW
In accordance with the provisions outlined in the Prescription Drug User Fee Act (PDUFA) and 
the Food and Drug Administration ( FDA )Guidance for Industry  Expedited Programs for Serious 
Conditions –Drugs and Biologics (May  2014)1, Pfizer and BioNTech are requesting Priority  
Review Designation for the expansion of licensure of BNT162b 2 (COMIRNATY) to individuals 
12-15 years of age .BNT162b2 is a prophy lactic vaccine that targets severe acute respiratory  
syndrome Coronavirus- 2 (SARS -CoV -2), which causes Coronavirus Disease 2019 ( COVID -19). 
The proposed expanded indication for the candidate vaccine is active immunization to prevent 
COVID -19disea se caused by SARS -CoV -2 in individuals ≥12years of age. The proposed 
dosage is 30 µg via intramuscular (IM) injection following a dosing regimen of two 0.3 -mL 
doses given 3 weeks apart. The Investigational New Drug Application ( IND 19736 )for 
BNT162b2 was effective on 29 April 2020. Emergency  use authorization (EUA 27034) for 
active immunization to prevent COVID -19 caused by  SARS -CoV -2was initially  issued for 
BNT162b2 (Pfizer -BioNTech COVID -19 Vaccine) on 11 December 202 0 for individuals 16 
years of age and older. Emergency  use authorization was extended to individuals 12 through 15 
years of age on 10 May 202 1.BNT162b2 was licensed for use in individuals 16 y ears of age and 
older on 23 August 2021 (BLA 125742). The BLA was granted Priorit y Review Designation. 
Pfizer and BioNTech are presentl y seeking expansion of licensure of BNT162b2 to include 
individuals 12 -15 years of age and are requesting priority  review .
1.1.Rationale for Priority Review
The supplemental Biologics L icense Application ( sBLA) for BNT162b2 meets the criteria for 
priority  review designation , as outlined i n the 2014 Guidance for Industry : Expedited Programs 
for Serious Conditions –Drugs and Biologics ,because BNT162b2 prevents a serious and 
life-threatening condition (COVID -19) in individuals 12-15 years of age and, if approved, would 
provide a significant improvement in safet y andeffectiveness because there are currentl y no 
vaccines licensed for the prevention of COVID-19 in the US for this age group (Section 1.2and 
Section 1.4).1
1.2.Serious and Life -threatening Disease
1.2.1. Background and Clinical Presentation of COVID-19
COVID -19 is caused by  SARS -CoV -2, a zoonotic virus that first emerged as a human pathogen 
in China and ha s rapidl y spread around the world by  human -to-human transmission. SARS -CoV -
2 infections and the resulting disease COVID -19 have spread globall y, and on 11 March 2020 
the World Health Organization ( WHO )characterized the COVID -19 outbreak as a pandemic. At 
the time of this submission, the ongoing pandemic remains a significant challenge to public 
health and economic stability  worldwide, for which for a licensed prophy lactic vaccine is a 
necessary  and critical mitigation. 
COVID -19 presentation is generall y with cough and fever, with chest radiography  showing 
ground -glass opacities or patch y shadowing.2However, man y patients present without fever or 
radiographic changes, and infections may  be as ymptomatic which is relevant to controlling 
transmission. For sy mptomatic patients, disease progression may lead to acute respiratory  distress 
syndrome requiring ventilation, subsequent multi- organ failure, and death.2   
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Page 5Common sy mptoms in hospitalized patients (in order of highest to lowest frequency ) include 
fever, dry  cough, shortness of breath, fatigue, my algias, nausea/vomiting or diarrhea, headache, 
weakness, and rhinorrhea.2Anosmia (loss of smell) or ageusia (loss of taste) may be the sole 
presenting s ymptom in approximately  3% of individuals who have COVID-19.2
The US Centers for Disease Control and Prevention (CDC) defined COVID- 19 sy mptoms as 
including 1 or more of the following:3fever, 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, fatigue, headache, nasal congestion or runny nose, or nausea.
All ages may  present with the disease, with case fatalit y rates (CFR) elevated in persons 
>60years of age.4Comorbidities are associated with increased CFR, including cardiovascular 
disease, diabetes, hy pertension, and chronic respiratory  disease.5Healthcare workers are over -
represented among COVID -19 patient s due to occupational exposure to infected patients.5In the 
US, the death total has risen to almost 800,000 as of 12 December 2021 (Figure 1).6
Figure 1Trends in Total Deaths in The United States Reported to CDC
1.2.2. Incidence and Prevalence of COVID-19
With the widespread availability  of COVID -19 vaccines in the United States, the disease burden 
has shifted to increasingly impact younger age groups, particularl y pediatric and adolescent 
populations who remain largel y unvaccinated.7As of the week ending October 16, 2021, the age 
groups 5 -11, 12 -15, and 16 -17 years had among the highest weekl y case rates per 100,000 
population (164.1, 154.0, and 163.8 per 100,000, respectivel y).8Although the hospitalization rate 
among those 12 -17 years of age is low relative to other age groups (1.6/100,000 or lower since 
Octo ber 2021)9, among those who are hospitalized, the risk of progression to severe disease 
(requiring ICU admission, invasive mechanical ventilation, or in -hospital death) in this age group 
is approximately  30-34%.10,11,12
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Page 61.3.Unmet Medical Need
Vaccination is the m ost effective medical countermeasure to decrease risk and mitigate spread of 
the SARS -CoV -2 virus. Immunization with a safe and effective COVID -19 vaccine is a critical 
component of the nation’s strategy  to reduce COVID -19-related illnesses, hospitalizatio ns, and 
deaths and to help restore societal functioning.  
Data from pre -clinical and clinical studies on tolerability , safety, immunogenicity , and efficacy  
of Pfizer -BioNTech COVID-19 Vaccine have shown the known and potential benefits outweigh 
the known and potential risks for individuals 16 y ears of age and older, and formed the basis of 
approval of Pfizer -BioNTech COVID -19 Vaccine in the US. As of December 2021, BNT162b2 
30-µg has received temporary  authorization for emergency  use, conditional marketing
authorization approval, or full approval in >90 countries globall y.
Licensure of Pfizer -BioNTech COVID -19 Vaccine for use in individuals 12- 15 years of age at 
this time addresses an urgent public health need. These adolescents have experienced 
unprecedented prolonged disruption to education and social development for over a year during 
the SARS -CoV -2 pandemic, due to infection risk in congregate settings; this in turn creates 
significant challenges for families and communities, in particular whe re the pandemic has 
exacerbated pre -existing socio- economic disparities.13,14Education is a key  determinant of health 
and a driver of economic opportunity . Expanding COVID -19 vaccination eligibility  to include 
adolescents, in addition to individuals 16 years of age and older, would further protect 
communities (eg, support a safe return to in -person learning for schools and increase vaccination
rates overall ). Licensure of Pfizer -BioNTech COVID- 19 Vaccine in individuals 12 -15years of 
age, based on demonstrat ed effectiveness (via immunobridging), efficacy , and safet y data from 
approximately  2200 individuals in this age group in pivotal Study  C4591001, would address 
critical and dual unmet needs for public health and education.
1.4.Significant Improvement in Safety and Effectiveness through Prevention of COVID-19 
Disease
1.4.1. Overview of Immunogenicity
Refer to Section 11.3 of the adolescent interim CSR dated 14 April 2021 (through data cutoff 
date of 13 March 2021, Module 5.3.5.1 C4591001 Adolescent Interim CSR ) for full details of 
immunogenicit y anal yses for adolescent participants 12- 15 years of age, including results for 
additional immunogenicity  endpoints which were anal yzed for SARS -CoV -2 serum neutralizing 
titers (GMTs, GMFRs, and s eroresponse rates).
Immune response to BNT162b2 30 µg in SARS- CoV -2 50% neutralizing titers in adolescents 
12-15 years of age was noninferior to (and in fact exceeded) the immune response in y oung 
adults 16-25 years of age, which provides immunobridging for adolescents. Substantial increases 
over baseline in neutralizing GMTs and high seroresponse rates were observed at 1 month after 
Dose 2 in both age groups, which were observed for participants with baseline SARS -CoV -2 
positive and negative status. The vast majority  of BNT162b2 recipients in both age groups 
achieved a ≥4-fold rises from before vaccination to 1 month after Dose 2.
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Page 71.4.2. Overview of Efficacy – Updated Analysis
Refer to Section 11 of the adolescent 6-month update interim CSR dated 12December 2021 
(Module 5.3.5.1 C4591001 Adolescent 6 -Month Update Interim CSR ) for full details of updated 
efficacy  analyses for adolescent participants 12 -15 years of age . Descriptive efficacy  anal yses 
were conducted for the adolescent group on cases accrued during b linded placebo -controlled 
follow -up period through the data cutoff date of 02 September 2021. 
In the adolescent group, in efficacy  anal yses in the evaluable efficacy  population based on cases 
reported from at least 7 days after Dose 2 through the data cut off date (02 September 2021), the 
estimated VE against confirmed COVID -19 was 100% (95% CI: 86.8%, 100%) for individuals 
without evidence of prior SARS -CoV -2 infection before and during vaccination regimen, and 
100% (2 -sided 95% CI: 87.5%, 100%) for those with or without evidence of prior SARS -CoV -2 
infection before and during vaccination regimen. 
Among participants without and with or without evidence of SARS -CoV -2 infection before and 
during the vaccination regimen (evaluable efficacy population), VE aga inst COVI D-19 occurring 
at least 7 day s after Dose 2 was evaluated for demographic and risk subgroups, and the estimated 
VE was 100.0% for all subgroups.
The efficacy anal ysis for the Dose 1 all -available (modified intention -to-treat) population, 
included 3 cases in the BNT162b2 group (all occurring within <11 day s after Dose 1 and in 
participants who had baseline SARS -CoV -2 negative status) and 48 cases in the placebo group, 
with an estimated VE against all cases occurring at an y time after Dose 1 of 94.0% (2-sided 95% 
CI: 81.3%, 98.8%).
No severe cases were reported in the 12- 15 years of age group as of the data cutoff date 
(02September 2021).
Most variants sequenced were neither Variant of Interest (VOI) nor Variant of Concern (VOC) 
except for the B.1.1. 7 (Alpha) found in 23.3% of placebo participants. All of the cases in the 
efficacy  anal yses occurred between 02 November 2020 to 19 May  2021, which is before the 
Delta surge in the US.
Overall, these updated efficacy data strongl y support BNT162b2 use in a dolescents 12-15 years 
of age.
1.4.3. Overview of Safety
Refer to Section 1 2of the adolescent 6 -month update interim CSR dated 12 December 2021 
(through data cutoff date of 02 September 2021, Module 5.3.5.1 C4591001 Adolescent 6 -Month 
Update Interim CSR ) for ful l details of updated safety analyses for adolescent participants 12 -15 
years of age.
Based on Phase 3 data from 2260 participants 12- 15 years of age with up to at least 6 months of 
follow -up after Dose 2 in Study  C4591001, BNT162b2 at 30 µg was safe and well- tolerated and 
aligned with that previously  demonstrated for 16 yrs and older. The AE profile did not suggest 
any new safet y concerns. The incidence of SAEs was low in the context of the number of 
participants enrolled and compar able in the BNT162b2 and placebo groups. Only  1 participant 
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Page 8discontinued from the study  due to an AE (related nonserious AE of py rexia [previously  
reported]), and there were no deaths.
Cumulative safety  follow -up from Dose 1 to 6 months after Dose 2 for 11 13 adolescent 
participants originally randomized to BNT162b2 (comprising the combined blinded 
placebo- controlled and open -label observational periods), and from the open -label follow -up of 
1010 adolescent participants originall y randomized to placebo (from the time of unblinding to 
receive BNT162b2 until the data cutoff date), showed no new safet y signals or suggested an y 
new safety  concerns arising from this period of follow -up.
Similarly , anal yses of new AEs since the EUA data snapshot showed no new safet y signals or 
concerns.
Safety  anal ysis results for subgroups based on demographics (age, race, ethnicity , and sex) and 
by baseline SARS -CoV -2 status (positive vs negative) have not shown an y clinically important 
differences in the BNT162b2 safet y profile.
Adolescent Phase 3 safety data were generall y concordant with previousl y reported adult safet y 
data ( ≥16 y ears of age) in Phases 1- 3 of the stud y.
1.4.4. Overview of Supportive Real World and Post -Authorization Data Following Use of 
BNT162b2 in Children 12 -15 Yea rs of Age
The Phase 3 Study  C4591001 updated efficacy  results are supported b y contemporaneous real -
world data from Israel and the United States demonstrating high vaccine effectiveness (90%) of 
two doses of BNT162b2 against sy mptomatic COVID -19 in the ado lescent 
population.15,16,17,18,19,20
Two studies from Israel examined short -term VE against infection up to 3- 4 weeks after the 
second dose among adolescents without prior SARS- CoV -2 infection.15,16Among individuals 
aged 12 -15 years who received their second dose between July  1, 2021 and July  24, 2021 (i.e., 
during the earl y stages of the delta variant outbreak in I srael), adjusted VE against infection in 
the 8- 28 day s after the second dose was 92% (95% CI : 88-94).15Similarly, in another study  of 
adolescents aged 12 -18 years vaccinated between June 8 -September 14, 2021, a time period 
when the delta variant accounted for over 95% of all new cases in Israel, VE in the 7 -21 day s 
after the second dose was 90% (95% CI: 88 -92) against infection and 93% (95% CI : 88-97) 
against sy mptomatic COVID -19.16  
Results from two studies reporting VE against infection among US adolescents are remarkabl y 
consistent with the results observed in Israel.17,18Among Kaiser Permanente Southern California 
(KPSC) members aged 12- 15 years, the adjus ted VE against infection through August 8, 2021 
was 91% (95% CI: 88 -93). Further, protection against infection remained high through 3 months 
following the second dose (the latest follow -up available with sufficient sample size for 
evaluation); adjusted VE at <1 month, 1 to <2 months, and 2 to <3 months was 91% (95%: 86 -
94), 92% (95% CI: 88- 94), and 88% (95% CI : 68-96), respectively .17In another US study  
examining Kaiser Permanente Northwest enrollees during July  4-September 11, 2021, a period 
of delta predominance, the incidence rate ratio for infection comparing vaccinated ( ≥2 doses) 
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Page 9versus unvaccinated adolescents aged 12 -17 years was 8.9 (95% CI: 6.6 -11.9), which can be 
calculated as a VE against infection of approximately  91%.18
Two CDC studies that assessed protection against hospitalization among the adolescent 
population reported VE estimates of approximately  90%.19,20Among US patients aged 12 -18 
years hospitalized at 19 pediatric hospitals across 16 states, adjusted VE against hospitalization 
during June 1 -September 30, 2021 was 93% (95% CI : 83-97). Results were similar when 
stratified by  age group; VE was 91% (95% CI : 74-97) among patients aged 12 -15 years and 94% 
(95% CI : 78-99) among patients aged 16 -18 years. The median (interquartile range [IQR]) 
duration between the second dose and illness onset was 72 (45- 97) day s.19The second stud y 
estimated the risk of hospitalization by  vaccination status among adolescents aged 12 -17 years 
from June 20- July 31, 2021. This study  reported an incidence rate ratio of 10.1 ( 95% CI : 3.7-
27.9), which can be calculated as a VE of approximately  90%. It should be noted, however, that 
the sample size of this analy sis was small (n=68).20
Overall, real -world effectiveness data to date indicate high VE against infection and 
hospitalization following two doses of BNT162b2 in individuals 12 -15 years of age of 
approximately  90%.
Real-world safet y surveillance data has shown that ra re cases of post- vaccination my ocarditis 
may occur in individuals 12− 15 years of age (21.5 per million second doses administered based 
on VAERS).21These events tend to occur more frequently  after the second dose and among 
males (39.9 vs 3.9 per million sec ond doses administered in males versus females, 
respectivel y).21
1.4.5. Overview of Post -authorization Safety Data
Post-authorization safety  data are continuall y monitored by Pfizer and BioNTech for 
pharmacovigilance and risk management purposes. Pfizer’s safet y database contains cases of 
AEs reported spontaneously  to Pfizer, cases reported by  the health authorities, cases published in 
the medical liter ature, cases from Pfizer -sponsored marketing programs, non- interventional 
studies, and cases of serious AEs reported from clinical studies regardless of causalit y 
assessment. Cumulatively, out of the 629,525 total reports received through 30 September 2021 , 
there was a total of 3320 post -marketing reports containing 10,050 events occurred in pediatric 
individuals aged between 12 and 15 y ears of age.
Consistent with events in Phase 2/3 of Study C4591001, most reported AEs were in SOCs with 
reactogenicity  events. T he SOCs that contained the greatest number (≥ 5%) of events included 
General disorders and administration site conditions (2545 AEs), Nervous sy stem disorders (1606), 
Injury , poisoning and procedural complications (1131), Gastrointestinal disorders (8 30), Skin and 
subcutaneous tissue disorders (599), Musculoskeletal and connective tissue disorders (584), 
Respiratory , thoracic and mediastinal disorders (495), Cardiac disorders (362), Investigation (350), 
Infections and infestations (229), Psychiatric di sorders (188) and Vascular disorders (167). 
The safet y profile of BNT162b2 remains aligned with the approved label. There was no new 
significant information emerging from the close monitoring for anaph ylaxis and 
myocarditis/pericarditis, and the anal yses of cumulative post -authorization safet y data, including 
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Page 10a review of AESIs, are consistent with the analy sis of the pivotal clinical study  (C4591001) and 
has confirmed the favorable benefit -risk profile of the vaccine.
Further details regarding the cumulati ve anal ysis of post -authorization safety  data are presented 
in Module 5.3.6.
1.5.Conclusions
The sBLA meets the criteria for priority  review designation, as outlined in the 2014 Guidance for 
Industry: Expedited Programs for Serious Conditions – Drugs and Biologics because BNT162b2 
prevents a serious and life -threatening condition (COVID -19) and, if approved, would provide a 
significant improvement in safet y and effectiveness because there are currently  no vaccines 
licensed for the prevention of COVID -19 in the US for individuals 12 -15 years of age .1
The available and updated clinical data for BNT162b2 effectiveness includes induction of strong 
immune respo nses and overwhelmingly  high vaccine efficacy with a satisfactory  safet y profile, 
suggesting that the vaccine confers safe and effective protection against COVID -19 in 
individuals ≥12 y ears of age. 
The potential risks are based on the observed clinical st udy safet y profile to date, which shows low 
incidence of severe or serious events, and no new clinically  concerning safety  observations or 
safet y concerns (and mostly  mild reactogenicity , as previously  reported). The vaccine has been 
shown to be safe and w ell-tolerated irrespective of prior infection with SARS- CoV -2. In this 
adolescent age group, no AEs were reported that suggested an y potential cases of severe 
COVID -19. 
The safet y profile of BNT162b2 remains aligned with the approved label. There was no new 
significant information emerging from the close monitoring for anaph ylaxis and my ocarditis. 
Review of post -authorization data did not identify  any additional or unexpected risks associated 
with BNT162b2 and confirms the favorable benefit -risk balance observed in the clinical study . 
Post-marketing surveillance activities will continue.
The currently  available evidence on real- world effectiveness strongl y supports a positive benefit-
risk profile for v accination of individuals 12−15 years of age with BNT162b2 to protect against 
COVID -19 and add another important lay er of community  protection as the US struggles to turn 
the corner on the pandemic, ensure that the success of the vaccination program achiev ed to date 
is not undone, and resume normal life. 
Efficacy  data suggest highly  effective protection against COVID -19 in a broad population of 
individuals across demographic characteristics including age and prior SARS -CoV -2 infection, 
with 100% VE observe d in adolescents 12- 15 years of age. 
Overall, the potential risks and benefits in adolescents, as assessed b y the updated safety and 
efficacy  profiles of BNT162b2, are balanced in favor of the potential benefits to prevent 
COVID -19 in immunized individual s 12- 15 years of age. Important risks of BNT162b2 are 
described in the Pharmacovigilance Plan and will continue to be assessed and minimized as 
described in the updated Pharmacovigilance Plan . The public health impacts that include 
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Page 11individual and com munity health, education, and socio -economic outcomes also weigh in favor 
of expediting full licensure of BNT162b2 for immunization of individuals 12 -15 years of age.
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Page 1312Havers FP, Whitaker M, Self JL, et al. Hospitalization of Adolescents Aged 12- 17 Years 
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