Secondary Cases of Delta Variant Coronavirus Disease 2019 Among Vaccinated Healthcare Workers With Breakthrough Infections is Rare.

Waldman, Sarah E; Buehring, Tara; Escobar, Daniel J; Gohil, Shruti K; Gonzales, Ralph; Huang, Susan S; Olenslager, Keith; Prabaker, Kavitha K et al. · Clin Infect Dis · 2022

retrospective_cohort · Level III

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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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