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. 2021 Sep;26(39):2100822.
doi: 10.2807/1560-7917.ES.2021.26.39.2100822.

Nosocomial outbreak caused by the SARS-CoV-2 Delta variant in a highly vaccinated population, Israel, July 2021

Pnina Shitrit  1   2 , Neta S Zuckerman  3 , Orna Mor  3   4 , Bat-Sheva Gottesman  2   5 , Michal Chowers  2   5
Affiliations

Nosocomial outbreak caused by the SARS-CoV-2 Delta variant in a highly vaccinated population, Israel, July 2021

Pnina Shitrit et al. Euro Surveill. 2021 Sep.

Abstract

A nosocomial outbreak of SARS-CoV-2 Delta variant infected 42 patients, staff and family members; 39 were fully vaccinated. The attack rate was 10.6% (16/151) among exposed staff and reached 23.7% (23/97) among exposed patients in a highly vaccinated population, 16-26 weeks after vaccination (median: 25 weeks). All cases were linked and traced to one patient. Several transmissions occurred between individuals wearing face masks. Fourteen of 23 patients became severely sick or died, raising a question about possible waning immunity.

Keywords: COVID-19; Delta variant; Israel; Nosocomial; SARS-CoV-2.

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Conflict of interest statement

Conflict of interest: None declared.

Figures

Figure
Figure
Whole genome-based phylogenetic tree of SARS-CoV-2 Delta isolates, nosocomial outbreak, Israel, July 2021 (n =12)
See this image and copyright information in PMC

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