AP
Inside China's new lab conducting late-stage vaccine trials (August, 2020)
CNN's David Culver takes us inside a brand new vaccine lab in China and speaks to scientists there about how close they are to a coronavirus vaccine.
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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.
