mRNA vaccines prevent infections as well as symptoms

SARS-CoV-2 vaccines

In the US, 3950 healthcare workers, with no documented history of SARS-CoV-2 infection, received the Pfizer or Moderna vaccines at the beginning of the vaccination program, in December 2020. Participants were taught to swab themselves once a week and also when they felt any symptoms, shipping the swabs on cold packs for PCR assay. On 13 March, 2021, 63% of them had received both vaccine doses, 12% received only one dose, and 25% were unvaccinated. Of 172 infections [...]

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