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.
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Source |
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8485578 | PMC |
| http://dx.doi.org/10.2807/1560-7917.ES.2021.26.39.2100822 | DOI Listing |
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