Analysts said the efficacy rate of Sinovac’s Coronavac vaccine in Brazil — the lowest among its global competitors — could affect international confidence in Chinese-made vaccines and hamper Beijing’s effort to repair its image from its early mishandling of the initial outbreak by providing Covid-19 vaccines to developing countries.
“The Butantan Institute and the Government of Sao Paulo report that the coronavirus vaccine achieved a 50.38% overall efficacy rate in the clinical study conducted in Brazil, in addition to (an efficacy rate of) 78% for mild cases and 100% for moderate and severe cases of Covid-19. All rates are higher than the 50% level required by the WHO (World Health Organization),” the statement released Tuesday said.
The razor-thin margin for regulatory approval is likely to lead to concern among scientists, given that last week the Butantan institute released…
