Chinese coronavirus vaccine shows 50% efficacy in Brazil

The ChineThe 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.se-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.

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