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Pfizer, Moderna COVID-19 vaccines highly effective after first shot in real-world use: US study

March 30, 2021 BDNEWS, bdnews24.com - Home

COVID-19 vaccines developed by Pfizer Inc with BioNTech SE and Moderna Inc reduced risk of infection by 80% two weeks or more after the first of two shots, according to data from a real-world US study released on Monday.

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