Single Pfizer vaccine shot provides strong protection for those who’ve had Covid-19, UK studies suggest
Just one dose of Pfizer/BioNTech’s coronavirus vaccine can induce a strong enough immune response in people who have already had Covid-19 that it could protect from future disease, according to two new papers published in the journal The Lancet on Thursday. In the United States, the vaccine is authorized as two doses taken 21 days
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