India's Covaxin Has 77.8% Efficacy Rate Against Symptomatic COVID-19 Infection, Reveals Lancet Study - 12.11.2021, Sputnik International

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India's Covaxin Has 77.8% Efficacy Rate Against Symptomatic COVID-19 Infection, Reveals Lancet Study - 12.11.2021, Sputnik International | Zootzle