india today education: The Moderna and Pfizer-BioNTech vaccines are very effective in real-world conditions at preventing infections, the C.D.C. reported.

Monday, March 29, 2021

The Moderna and Pfizer-BioNTech vaccines are very effective in real-world conditions at preventing infections, the C.D.C. reported.

By Gina Kolata from NYT World https://ift.tt/3fsPOhR
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