“In the largest real-world observational study comparing natural immunity gained through previous SARS-CoV-2 infection to vaccine-induced immunity afforded by the Pfizer vaccine, people who recovered from COVID were much less likely than never-infected, vaccinated people to get Delta, develop symptoms or be hospitalized.”
Fully Vaccinated With Pfizer? You’re 6 to 13 Times More Likely to Get Delta Than Someone With Natural Immunity, Study Says
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