Safety and Efficacy of the BNT162b2 mRNA Covid-19 Vaccine

被引:10664
作者
Polack, Fernando P. [1 ]
Thomas, Stephen J. [3 ]
Kitchin, Nicholas [5 ]
Absalon, Judith [4 ]
Gurtman, Alejandra [4 ]
Lockhart, Stephen [5 ]
Perez, John L. [6 ]
Perez Marc, Gonzalo [2 ]
Moreira, Edson D. [8 ,9 ]
Zerbini, Cristiano [10 ]
Bailey, Ruth [5 ]
Swanson, Kena A. [4 ]
Roychoudhury, Satrajit [11 ]
Koury, Kenneth [4 ]
Li, Ping [6 ]
Kalina, Warren V. [4 ]
Cooper, David [4 ]
Frenck, Robert W., Jr. [12 ]
Hammitt, Laura L. [13 ]
Tureci, Ozlem [14 ]
Nell, Haylene [16 ]
Schaefer, Axel [15 ]
Unal, Serhat [17 ]
Tresnan, Dina B. [18 ]
Mather, Susan [7 ]
Dormitzer, Philip R. [4 ]
Sahin, Ugur [14 ]
Jansen, Kathrin U. [4 ]
Gruber, William C. [4 ]
机构
[1] Fdn INFANT, Buenos Aires, DF, Argentina
[2] ITrials Hosp Mil Cent, Buenos Aires, DF, Argentina
[3] SUNY Upstate Med Univ, Syracuse, NY 13210 USA
[4] Pfizer, Vaccine Res & Dev, Pearl River, NY USA
[5] Pfizer, Vaccine Res & Dev, Hurley, England
[6] Pfizer, Vaccine Res & Dev, Collegeville, PA USA
[7] Pfizer, Worldwide Safety Safety Surveillance & Risk Manag, Collegeville, PA USA
[8] Assoc Obras Sociais Irma Dulce, Salvador, BA, Brazil
[9] Fundacao Oswaldo Cruz, Salvador, BA, Brazil
[10] Ctr Paulista Invest Clin, Sao Paulo, Brazil
[11] Pfizer, Global Product Dev, Peapack, NJ USA
[12] Cincinnati Childrens Hosp, Cincinnati, OH USA
[13] Johns Hopkins Bloomberg Sch Publ Hlth, Baltimore, MD USA
[14] BioNTech, Mainz, Germany
[15] Medizentrum Essen Borbeck, Essen, Germany
[16] Karl Bremer Hosp, Tiervlei Trial Ctr, Cape Town, South Africa
[17] Hacettepe Univ, Ankara, Turkey
[18] Pfizer, Worldwide Safety Safety Surveillance & Risk Manag, Groton, CT USA
关键词
D O I
10.1056/NEJMoa2034577
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
BACKGROUND Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and the resulting coronavirus disease 2019 (Covid-19) have afflicted tens of millions of people in a worldwide pandemic. Safe and effective vaccines are needed urgently. METHODS In an ongoing multinational, placebo-controlled, observer-blinded, pivotal efficacy trial, we randomly assigned persons 16 years of age or older in a 1:1 ratio to receive two doses, 21 days apart, of either placebo or the BNT162b2 vaccine candidate (30 mu g per dose). BNT162b2 is a lipid nanoparticle-formulated, nucleoside-modified RNA vaccine that encodes a prefusion stabilized, membrane-anchored SARS-CoV-2 full-length spike protein. The primary end points were efficacy of the vaccine against laboratory-confirmed Covid-19 and safety. RESULTS A total of 43,548 participants underwent randomization, of whom 43,448 received injections: 21,720 with BNT162b2 and 21,728 with placebo. There were 8 cases of Covid-19 with onset at least 7 days after the second dose among participants assigned to receive BNT162b2 and 162 cases among those assigned to placebo; BNT162b2 was 95% effective in preventing Covid-19 (95% credible interval, 90.3 to 97.6). Similar vaccine efficacy (generally 90 to 100%) was observed across subgroups defined by age, sex, race, ethnicity, baseline body-mass index, and the presence of coexisting conditions. Among 10 cases of severe Covid-19 with onset after the first dose, 9 occurred in placebo recipients and 1 in a BNT162b2 recipient. The safety profile of BNT162b2 was characterized by short-term, mild-to-moderate pain at the injection site, fatigue, and headache. The incidence of serious adverse events was low and was similar in the vaccine and placebo groups. CONCLUSIONS A two-dose regimen of BNT162b2 conferred 95% protection against Covid-19 in persons 16 years of age or older. Safety over a median of 2 months was similar to that of other viral vaccines. (Funded by BioNTech and Pfizer; ClinicalTrials.gov number, NCT04368728.)
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页码:2603 / 2615
页数:13
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