Study: Pfizer Vaccine Efficacy Against COVID-19 Infections Dropped Over 5 Months

BOSTON (CBS) – A new study on the Pfizer vaccine found its efficacy against COVID-19 dropped over the course of five months.

The research found the vaccine remained highly effective at preventing hospitalizations and death, but less effective at stopping infection.

The researchers do not believe it is because of the Delta variant.

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• Coronavirus