Pfizer-BioNTech’s vaccine gets slightly weaker over time, company data shows, but remains strong in preventing severe disease. by BY CARL ZIMMER AND SHARON LAFRANIERE

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With cases rising in the U.S., the findings may influence the Biden administration’s deliberations about delivering a booster shot.

Published: July 28, 2021 at 05:36PM

from NYT Health https://ift.tt/3iZpVX4