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TanzaniteMotherLodeon Oct 05, 2021 7:14am
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Pfizer vaccine wanes after 5 months from 88% to 47%
Pfizer vaccine wanes after 5 months from 88% to 47%The new study, one of the largest and longest to track the effectiveness of a vaccine in Americans, found that the vaccine's ability to protect against infection stood at 88% in its first month, then fell to 47% after just five months. https://ca.yahoo.com/news/pfizer-vaccines-protection-wanes-over-022938192.html