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Pfizer says Covid-19 vaccine protection lasts at least six months, protects against variants

The ongoing Phase 3 clinical trial of Pfizer/BioNTech's coronavirus vaccine confirms its protection lasts at least six months after the second dose, the companies said Thursday.

source https://www.cnn.com/2021/04/01/health/pfizer-covid-vaccine-efficacy-six-months-bn/index.html
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