PreprintCited by 2,615SARS-CoV-2 and COVID-19 ResearchCOVID-19 Clinical Research StudiesImmunotherapy and Immune Responses

RNA-Based COVID-19 Vaccine BNT162b2 Selected for a Pivotal Efficacy Study

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Walsh, Edward E., Frenck, Robert, Falsey, Ann R., Kitchin, Nicholas, Absalon, Judith, Gurtman, Alejandra, Lockhart, Stephen, Neuzil, Kathleen +17 more·2020·New England Journal of Medicine

Abstract

Background: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections and the resulting disease, coronavirus disease 2019 (COVID-19), have spread to millions of people globally. Multiple vaccine candidates are under development, but no vaccine is currently available. Methods: Healthy adults 18–55 and 65–85 years of age were randomized in an ongoing, placebo-controlled, observer-blinded dose-escalation study to receive 2 doses at 21-day intervals of placebo or either of 2 lipid nanoparticle–formulated, nucleoside-modified RNA vaccine candidates: BNT162b1, which encodes a secreted trimerized SARS-CoV-2 receptor-binding domain, or BNT162b2, which encodes a prefusion stabilized membrane-anchored SARS-CoV-2 full-length spike. In each of 13 groups of 15 participants, 12 received vaccine and 3 received placebo. Groups were distinguished by vaccine candidate, age of participant, and vaccine dose level. Interim safety and immunogenicity data of BNT162b1 in younger adults have been reported previously from US and German trials. We now present additional safety and immunogenicity data from the US Phase 1 trial that supported selection of the vaccine candidate advanced to a pivotal Phase 2/3 safety and efficacy evaluation. Results: In both younger and older adults, the 2 vaccine candidates elicited similar dose- dependent SARS-CoV-2-neutralizing geometric mean titers (GMTs), comparable to or higher than the GMT of a panel of SARS-CoV-2 convalescent sera. BNT162b2 was associated with less systemic reactogenicity, particularly in older adults. Conclusion: These results support selection of the BNT162b2 vaccine candidate for Phase 2/3 large-scale safety and efficacy evaluation, currently underway.

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Crossref · 10.1101/2020.08.17.20176651

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  • The favorable safety profile observed during phase 1 testing of BNT162b2 was confirmed in the phase 2/3 portion of the trial.

    “The favorable safety profile observed during phase 1 testing of BNT162b24,8 was confirmed in the phase 2/3 portion of the trial.”

    From Safety and Efficacy of the BNT162b2 mRNA Covid-19 Vaccine (2020) · cites this paper as [4]

    The Introduction reports safety data from the Phase 1 portion of the trial, and the Discussion says those data helped select BNT162b2 for Phase 2/3 evaluation. The Discussion describes Phase 2/3 safety assessment as ongoing; this paper does not report Phase 2/3 results confirming the Phase 1 safety profile. No page numbers are available in our copy. (LLM, conf=0.90)

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  • BNT162b2 was chosen as the pivotal candidate based on all data from the two phase-I/II trials and non-human primate challenge studies.

    “BNT162b2 was selected as pivotal candidate on the basis of the totality of data obtained in the two phase-I/II trials and challenge studies in non-human primates 2,18 .”

    From BNT162b2 vaccine induces neutralizing antibodies and poly-specific T cells in humans (2021) · cites this paper as [2]

    The Introduction describes German and US clinical studies, and the Discussion says the clinical data guided the decision to advance BNT162b2 to the pivotal Phase 2/3 evaluation. Our copy does not say that non-human-primate challenge studies formed part of that decision, so the stated basis for selection is only partly supported. Page numbers are unavailable in our copy. (LLM, conf=0.86)

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  • The US trial elicited robust S1-binding IgG concentrations and neutralizing titres against wild-type Wuhan-Hu-1 SARS-CoV-2.

    “Robust concentrations of S1-binding immunoglobulin G (IgG) and neutralizing titres against a SARS-CoV-2 strain with the wild-type (Wuhan-Hu-1) S sequence were elicited.”

    From BNT162b2 vaccine induces neutralizing antibodies and poly-specific T cells in humans (2021) · cites this paper as [2]

    The Immunogenicity section (page unavailable) reports boosted antigen-binding IgG and neutralizing responses in the US trial; Figure 4 identifies the IgG measure as S1-binding. The methods identify the neutralization-test strain as USA_WA1/2020, but our copy does not establish that it had the wild-type Wuhan-Hu-1 S sequence. (LLM, conf=0.84)

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  • As in the US phase-I/II trial, prime-boost vaccination with 10-30 μg BNT162b2 elicited serum GMTs that after an initial decline remained stable for the entire nine-week post-booster follow-up, at or above the GMTs of COVID-19 convalescent individuals.

    “As reported for the phase-I/II trial in the USA 2 , prime-boost vaccination with 10 to 30 μg of BNT162b2 elicited GMTs of sera that-after an initial decline-remained stable for the entire follow-up of nine weeks after the booster dose, in the range of or higher than GMTs in individuals who had recovered from COVID-19.”

    From BNT162b2 vaccine induces neutralizing antibodies and poly-specific T cells in humans (2021) · cites this paper as [2]

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  • Together with reports of preserved neutralization of SARS-CoV-2 with key B.1.1.7 and B.1.351 spike mutations and of pseudovirus with the full B.1.1.7 spike mutation set, our data indicate broad BNT162b2-elicited immune recognition.

    “Together with recent reports of the preserved neutralization of SARS-CoV-2 with key S mutations found in the B.1.1.7 and the B.1.351lineage 39,40 , and neutralization of pseudovirus bearing the full set of mutations of B.1.1.7 S 41 , our data indicate broad BNT162b2-elicited immune recognition 2,13,14 .”

    From BNT162b2 vaccine induces neutralizing antibodies and poly-specific T cells in humans (2021) · cites this paper as [2]

    The Immunogenicity section reports BNT162b2-elicited antigen-binding and neutralizing responses, supporting immune recognition of the virus tested. It does not establish broad recognition across spike variants: the assay used the USA_WA1/2020 strain, and the Discussion says BNT162b2 cellular responses were still being studied. The variant-neutralization reports in the citing sentence have separate citations, not this one. (LLM, conf=0.86)

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Research works printed but not linked: 2

  1. Sahin U, Muik A, Derhovanessian E, et al. Concurrent human antibody and T H 1 type T-cell responses elicited by a COVID-19 RNA vaccine. July 20, 2020 (https://www.medrxiv.org/content/10.1101/2020.07.17.20140533v1). preprint. · DOI
  2. Muruato AE, Fontes-Garfias CR, Ren P, et al. A high throughput neutralizing antibody assay. May 22, 2020 (https://www.biorxiv.org/content/10.1101/2020.05.21.109546v1). preprint. · DOI

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Authors
Walsh, E. E., Frenck, R., Falsey, A. R., Kitchin, N., Absalon, J., Gurtman, A., Lockhart, S., Neuzil, K., Mulligan, M. J., Bailey, R., Swanson, K. A., Li, P., Koury, K., Kalina, W., Cooper, D., Fontes-Garfias, C., Shi, P.-Y., Türeci, Ö., Tompkins, K. R., Lyke, K. E., Raabe, V., Dormitzer, P. R., Jansen, K. U., Şahin, U., & Gruber, W. C.
Affiliations
Cincinnati Children's Hospital Medical Center (US)
Corresponding author
Absalon, Judith
Venue
New England Journal of Medicine
Publisher
openRxiv
Published
2020-08-20
Volume
383
Issue
25
Pages
2439-2450
ISSN
0028-4793 (ISSN-L)
OpenAlex
W3093367571
Cited by
2,615
References
21
Citations by year
2026: 76 · 2025: 133 · 2024: 229 · 2023: 353 · 2022: 696 · 2021: 1039 · 2020: 85 · 2012: 1
FWCI
71.32
Type
journal article
Language
en
Open access
Locations
  • New England Journal of Medicine (publishedVersion)
  • medRxiv (acceptedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (submittedVersion)
Funders
  • BioNTech
  • Pfizer
  • Georgia Clinical and Translational Science Alliance
  • National Institutes of Health (UL1TR001445)
  • National Center for Advancing Translational Sciences
Topics
  • Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
  • Health Sciences › Medicine › Infectious Diseases › COVID-19 Clinical Research Studies
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
Keywords
COVID-19 vaccines, SARS-CoV-2, BNT162b2, mRNA vaccines, lipid nanoparticle formulation, vaccine safety, immunogenicity, neutralizing antibodies, spike protein, receptor binding domain, prefusion spike, dose escalation, older adults, young adults, adverse events, systemic reactions

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