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An early look at the performance of COVID-19 booster shots during the recent omicron wave in the U.S. hinted at a decline in effectiveness, though the shots still offered strong protection against severe illness.
An early look at the performance of COVID-19 booster shots during the recent omicron wave in the U.S. showed a decline in effectiveness against severe cases, though the shots still offered strong protection.
Researchers estimated how well Pfizer or Moderna booster shots prevented COVID-related medical visits, including in the omicron surge.
NEW YORK (AP) — An early look at the performance of COVID-19 booster shots during the...
Researchers estimated how well Pfizer or Moderna booster shots prevented COVID-related medical visits, including in the omicron surge.