• Ann. Intern. Med. · Mar 2021

    Comment

    In adults, the Oxford/AstraZeneca vaccine had 70% efficacy against COVID-19 >14 d after the 2nd dose.

    • Zain Chagla.
    • McMaster University, Hamilton, Ontario, Canada (Z.C.).
    • Ann. Intern. Med. 2021 Mar 1; 174 (3): JC29.

    Source CitationVoysey M, Clemens SA, Madhi SA, et al. Safety and efficacy of the ChAdOx1 nCoV-19 vaccine (AZD1222) against SARS-CoV-2: an interim analysis of four randomised controlled trials in Brazil, South Africa, and the UK. Lancet. 2021;397:99-111. 33306989.

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