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
Authors: Merryn Voysey, Sue Ann Costa Clemens, Shabir A. Madhi, Lily Yin Weckx, Pedro M. Folegatti et al.