https://www.wsj.com/articles/chinas-sinovac-covid-19-vaccine-is-50-4-in-late-stage-brazil-trials-11610470581
Results in late-stage testing of Sinovac shot were almost 30 percentage points lower than previously announced, as concerns grow over the study’s transparency.

Chinese Covid-19 Vaccine Is Far Less Effective Than Initially Touted in Brazil
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