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. It’s the first look at how long protection for a coronavirus vaccine lasts, and while six months is a modest target, it’s longer than the 90 days of protection
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