Safety and efficacy of Pfizer and AstraZeneca COVID-19 vaccines even better than clinical trials predicted

By | April 29, 2021
Researchers in the UK and United States have demonstrated the efficacy of one dose of either the Pfizer-BioNTech or Oxford-AstraZeneca vaccine against infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in a real-world community setting in the UK.