COVID-19 -- Worldwide/Unknown
Abstract
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Background
SARS-CoV-2 vaccines are highly effective at preventing COVID-19-related morbidity and mortality. As no vaccine is 100% effective, breakthrough infections are expected to occur.
Methods
We analyzed the virological characteristics of 161 vaccine breakthrough infections in a population of 24 706 vaccinated healthcare workers (HCWs), using RT-PCR and virus culture.
Results
The delta variant (B.1.617.2) was identified in the majority of cases. Despite similar
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