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- W4295298761 endingPage "e0274509" @default.
- W4295298761 startingPage "e0274509" @default.
- W4295298761 abstract "The COVID-19 pandemic has had a devastating impact on the world over the past two years (2020-2021). One of the key questions about its future trajectory is the protection from subsequent infections and disease conferred by a previous infection, as the SARS-CoV-2 virus belongs to the coronaviruses, a group of viruses the members of which are known for their ability to reinfect convalescent individuals. Bulgaria, with high rates of previous infections combined with low vaccination rates and an elderly population, presents a somewhat unique context to study this question.We use detailed governmental data on registered COVID-19 cases to evaluate the incidence and outcomes of COVID-19 reinfections in Bulgaria in the period between March 2020 and early December 2021.For the period analyzed, a total of 4,106 cases of individuals infected more than once were observed, including 31 cases of three infections and one of four infections. The number of reinfections increased dramatically during the Delta variant-driven wave of the pandemic towards the end of 2021. We observe a moderate reduction of severe outcomes (hospitalization and death) in reinfections relative to primary infections, and a more substantial reduction of severe outcomes in breakthrough infections in vaccinated individuals.In the available datasets from Bulgaria, prior infection appears to provide some protection from severe outcomes, but to a lower degree than the reduction in severity of breakthrough infections in the vaccinated compared to primary infections in the unvaccinated." @default.
- W4295298761 created "2022-09-12" @default.
- W4295298761 creator A5005939272 @default.
- W4295298761 creator A5006290319 @default.
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- W4295298761 creator A5072629041 @default.
- W4295298761 date "2022-09-09" @default.
- W4295298761 modified "2023-10-05" @default.
- W4295298761 title "SARS-CoV-2 reinfections during the first three major COVID-19 waves in Bulgaria" @default.
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