Risk of SARS-CoV-2 infection following initial COVID-19 vaccination

A population-based cohort study

Anecdotally, there have been reports of newly diagnosed SARS-CoV-2 infection shortly after receiving the first dose of the COVID-19 vaccination. This led to speculation that the vaccination itself might inadvertently increase the risk of COVID-19 potentially due to airborne spread at mass vaccination clinics or relaxation of precautions following vaccination.

This study compared the risk of SARS-CoV-2 infection among individuals who received a first dose of the COVID-19 vaccine to unvaccinated individuals and explored whether differences in the risk of SARS-CoV-2 infection exist between vaccination settings.

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