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Five countries claim to have invented COVID-19 vaccine


Updated : 13 May 2020 10:55 AM (IST)

United States-based pharmaceutical giant Pfizer has begun testing multiple versions of an experimental vaccine in healthy young people in America. Pfizer has partnered with Germany’s BioNTech SE to explore a potential defense against the respiratory disease over 2.5 lakh people worldwide. The trial began by administering the first five vaccinations to people.



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