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Secondary Cases of Delta-Variant COVID-19 Among Vaccinated Healthcare Workers with Breakthrough Infections is Rare

Published Web Location

https://doi.org/10.1093/cid/ciab916
Abstract

In a retrospective, cohort study at 4 medical centers with high coronavirus disease 2019 vaccination rates, we evaluated breakthrough severe acute respiratory syndrome coronavirus 2 Delta variant infections in vaccinated healthcare workers. Few work-related secondary cases were identified. Breakthrough cases were largely due to unmasked social activities outside of work.

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