<div>CoronaVac is a well-tolerated vaccine containing inactivated severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), and it induced humoral responses in phase 1 and 2 studies. Analysis of a Brazilian phase 3 clinical trial that evaluated 12,607 participants showed that the vaccine had an efficacy of 50.39% 15 days after the 2nd dose.</div>