Pfizer and AstraZeneca vaccines were as effective as prior infection, U.K. study finds

Pfizer and AstraZeneca vaccines were as effective as prior infection, U.K. study finds
·1 min read

Two doses of either the vaccine made by Pfizer and BioNTech [s:bntx] or Oxford-AstraZeneca vaccines provided a similar level of protection to prior natural infection when the Delta variant was dominant, the

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