FILE – In this Feb. 1, 2021, file photo, a health worker prepares a dose of China’s Sinovac CoronaVac vaccine during a priority COVID-19 vaccination program for the elderly at a drive-thru vaccination center in Rio de Janeiro, Brazil. Regulators gave conditional approval for Sinovac Biotech Ltd’s shot, CoronaVac, on Friday, Feb. 5, clearing the way for general use, The National Medical Products Administration announced in a statement Saturday, Feb. 6.
