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Thursday, February 25, 2021
Pfizer, BioNTech Studying Third Covid-19 Vaccine Dose to Fight New Strains
Pfizer, BioNTech Studying Third Covid-19 Vaccine Dose to Fight New Strains: The companies have begun a study in people testing whether a third dose of their vaccine would increase its effectiveness against the variant identified in South Africa and other strains.
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