The Moderna and Pfizer-BioNTech vaccines are very effective in real-world conditions at preventing infections, the C.D.C. reported.
By Gina Kolata via NYT World https://ift.tt/3fsPOhR
The Moderna and Pfizer-BioNTech vaccines are very effective in real-world conditions at preventing infections, the C.D.C. reported.
Reviewed by zaira
on
March 29, 2021
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