Sinovac’s COVID-19 Vaccine Might Not Protect Against Brazilian Variant
A small study of Sinovac’s CoronaVac vaccine has found that it doesn’t appear to protect against a newly identified coronavirus variant in Brazil.
Researchers from Brazilian, U.S. and UK universities took blood plasma samples from eight vaccinated participants in Sinovac’s Brazilian phase 3 study and evaluated how well they held up against the new Brazilian strain.
They found that the new variant may evade the protection afforded by CoronaVac. Specifically, the plasma samples had six times less neutralizing capacity against the Brazilian strain than against the UK and South African strains. Additionally, five months after being given a booster shot of CoronaVac, plasma from vaccinated patients still failed to effectively neutralize the Brazilian variant.