South China Morning Post published this video item, entitled “Brazil study shows China’s Sinovac vaccine less effective than earlier data on the Covid-19 shots” – below is their description.
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 rate of 50.4 per cent, a figure way lower than the 78 per cent suggested by data released one week earlier by the São Paulo-based institute. The World Health Organization requires all vaccines to have at least 50 per cent efficacy.
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