SAO PAULO, Brazil (AFP) — Clinical trials of the CoronaVac coronavirus vaccine developed by Chinese laboratory Sinovac have “reached the efficacy threshold” demanded by the World Health Organization, the Brazilian institute charged with its production and distribution said on Wednesday. However, the Butantan Institute didn’t publish the results of those trials — the last before authorization. “We’re reached the efficacy threshold that allows us to seek an emergency use” authorization from Brazil’s Anvisa […]