The CoronaVac COVID19 vaccine developed by China’s Sinovac Biotech Ltd showed efficacy between 50% and 90% in Brazilian trials, Sao Paulo's state health secretary said, and its Brazilian producer said full trial results will be released by Jan. 7.from Top World News- News18.com https://www.news18.com/news/world/coronavac-efficacy-at-50-90-in-brazilian-trial-sao-paulo-official-3214247.html
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