Employees handle vials containing CoronaVac, Sinovac Biotech’s coronavirus vaccine, in the bottle filling section at Butantan biomedical production center in Sao Paulo, Brazil 12 January 2021.
Employees handle vials containing CoronaVac, Sinovac Biotech’s coronavirus vaccine, in the bottle filling section at Butantan biomedical production center in Sao Paulo, Brazil 12 January 2021. Photograph: Amanda Perobelli/Reuters


source https://www.theguardian.com/world/live/2021/jan/13/coronavirus-live-news-chinese-vaccine-50-effective-in-brazil-us-cdc-expands-pre-flight-covid-testing