Brazil study shows China’s Sinovac vaccine less effective than earlier data on the Covid-19 shots | South China Morning Post

China’s Sinovac Covid-19 vaccine has been found to be significantly less effective than previous data has suggested. Brazil’s biomedical centre Butantan Institute, which is running final-stage clinical trials for the vaccine called CoronaVac, released new data on January 12, 2021. It said the vaccine has an efficacy…

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