RIO DE JANEIRO, BRAZIL - Studies have shown that the Butantan vaccine is 100% effective for severe and moderate cases, but pressure is growing for details to be disclosed. Emergency use should be officially requested by Friday, January 8th.
The Coronavac, a vaccine developed by the Chinese Sinovac laboratory together with the Butantan Institute, showed 78% efficacy against Covid-19 in the trial developed in Brazil and sponsored by the Government of São Paulo, according to the state health authorities.
The immunizer, at the center of a political feud between President Jair Bolsonaro and Governor João Doria, also ensured . . .