January 13, 2021

A leading Chinese COVID-19 vaccine developed by Sinovac Biotech was just 50.38% effective in late-stage trials in Brazil, significantly lower than earlier results showed, according to a statement published by the government of Sao Paulo Tuesday.

While the number exceeds the threshold required for regulatory approval, it falls far below the 78% previously announced , raising questions as to the veracity of the data and fueling skepticism over the apparent lack of transparency regarding Chinese vaccines .…

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