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

Chagla, Zain · Ann Intern Med · 2021

rct · Level II

Where this comes from

Abstract

Voysey M, Clemens SA, Madhi SA, et al. <b>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.</b> Lancet. 2021;397:99-111. 33306989.

Medical subject headings