Sinopharm, Sinovac COVID-19 vaccine data show efficacy: WHO – Reuters   Commentary on Twitter WHO decision on Sinopharm & Sinovac vaccines coming in the next few weeks: signal from WHO at a press briefing that the decision may be positive https://t.co/HcbZnJ7WDE — Hilda Bastian, PhD (@hildabast) March 31, 2021  

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