F.D.A. Fully Approves Pfizer-BioNTech’s Vaccine, a First for a Covid-19 Shot अगस्त 23, 2021 byप्रगतिवादी मंच एक टिप्पणी भेजें The move was expected to kick off a round of new vaccination mandates from hospitals, schools and private companies. source https://www.nytimes.com/2021/08/23/health/pfizer-vaccine-approval-fda.html
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