Chinese coronavirus vaccine shows 50% efficacy in Brazil


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An employee picks up a vial containing CoronaVac, Sinovac Biotech's vaccine against the coronavirus disease (COVID-19) at Butantan biomedical production center in Sao Paulo, Brazil, Jan. 12, 2021. Reuters The Chinese-developed Coronavac Covid-19 vaccine has demonstrated a 50 percent efficacy following tests in Brazil, the organization in charge of its production in the South American country said on Tuesday. Coronavac has been given to frontline health care workers in close contact with coronavirus patients. The Butantan Institute repeated its claim from last week that the vaccine is 78 percent effective in mild cases that needed treatment and showed 100 percent...