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Sanofi and GSK initiate Phase 1/2 clinical trial of COVID-19 adjuvanted recombinant protein-based vaccine candidate

Sanofi and GSK initiate Phase 1/2 clinical trial of COVID-19 adjuvanted recombinant protein-based vaccine candidate


Pre-clinical studies show promising safety and immunogenicity.



Over 400 participants being enrolled in Phase 1/2 study



Pending positive Phase 1/2 data, companies aim to move into Phase 3 by end of 2020



Sanofi and GSK are scaling up manufacturing of the antigen and adjuvant with the target of producing up to one billion doses in 2021

PARIS and LONDON a?? Sept. 3, 2020 a?? Sanofi and GSK today started the Phase 1/2 clinical trial for their adjuvanted COVID-19 vaccine. The vaccine candidate, developed in partnership by Sanofi and GSK, uses the same recombinant protein-based technology as one of Sanofia??s seasonal influenza vaccines with GSKa??s established pandemic adjuvant technology.The Phase 1/2 clinical trial is a randomized, double blind and placebo-controlled trial designed to evaluate the safety, reactogenicity (tolerability) and immunogenicity (immune response) of the COVID-19 vaccine candidate. A total of 440 healthy adults are being enrolled in the trial across 11 investigational sites in the United States.The companies anticipate first results early December 2020 which will support the initiation of a Phase 3 trial in December 2020. If data are sufficient for licensure application, the plan is to request regulatory approval in the first half of 2021.Sanofi is leading the clinical development and registration of the COVID-19 vaccine. Preclinical data showed an acceptable reactogenicity profile and data based on two injections of the adjuvanted recombinant vaccine showed high levels of neutralizing antibodies that are comparable to levels in humans who recovered from the COVID-19 infection. Pre-clinical results will be published later this year. In parallel, Sanofi and GSK are scaling up manufacturing of the antigen and adjuvant with the target of producing up to one billion doses in 2021.
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