A man works in the packaging facility of Chinese vaccine maker Sinovac Biotech, developing an experimental coronavirus disease (COVID-19) vaccine, during a government-organized media tour in Beijing, China, September 24, 2020. REUTERS/Thomas Peter - RC2X4J91YY2U
The source, who did not provide data details, said the study had tested the blood of vaccinated people against the Brazilian variant of the virus. Coronavac, as the Sinovac shot is known, is the main vaccine currently being used to inoculate people in Brazil.