December 1, 2022

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Pfizer vaccine efficacy slips about 3% per month

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New study data

New study data
Data released today showed the efficacy of the Pfizer vaccine fell to 84% from 96% after six months. That decline means that a booster shot will likely be needed.

The good news though is that the overall efficacy of the vaccine was 97% against severe disease, including low oxygen levels and hospitalization.

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