Gustavo Dayan

Sep 13, 2023 | thelancet.com | Gustavo Dayan |Nadine Rouphael |Stephen Walsh |Nicole A. Grunenberg

Research in context Evidence before this study We searched PubMed from database inception to Dec 20, 2022, with no language restrictions, for studies reporting the efficacy or effectiveness of vaccines against emergent SARS-CoV-2 variants, including omicron (B.1.1.529), using the search terms “vaccine”, “efficacy OR effectiveness”, “SARS-CoV-2”, “omicron OR variant of concern OR emerging variant”, and “clinical trial”, and for studies reporting data from updated or bivalent vaccine candidates...