Some vaccinated losing more than 80% of their COVID-19 immunity six months after Pfizer shot: study

Some vaccinated losing more than 80% of their COVID-19 immunity six months after Pfizer shot: study: A new, multi-institutional study led by Case Western Reserve University—in partnership with Brown University—found that COVID-19 antibodies produced by the Pfizer vaccine decreased sharply in senior nursing home residents and their caregivers six months after receiving their second shots.

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