Reinfection rate in a cohort of healthcare workers over 2 years of the COVID-19 pandemic

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art_GUEDES_Reinfection_rate_in_a_cohort_of_healthcare_workers_2023.PDF (864.29 KB)
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26
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article
Data de publicação
2023
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Scopus
Web of Science
PubMed
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NATURE PORTFOLIO
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Citação
SCIENTIFIC REPORTS, v.13, n.1, 2023
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Unidades Organizacionais
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Resumo
In this large cohort of healthcare workers, we aimed to estimate the rate of reinfections by SARS-CoV-2 over 2 years of the COVID-19 pandemic. We investigated the proportion of reinfections among all the cases of SARS-CoV-2 infection from March 10, 2020 until March 10, 2022. Reinfection was defined as the appearance of new symptoms that on medical evaluation were suggestive of COVID-19 and confirmed by a positive RT-PCR. Symptoms had to occur more than 90 days after the previous infection. These 2 years were divided into time periods based on the different variants of concern (VOC) in the city of Sao Paulo. There were 37,729 medical consultations due to COVID-19 at the hospital's Health Workers Services; and 25,750 RT-PCR assays were performed, of which 23% (n = 5865) were positive. Reinfection by SARS-CoV-2 was identified in 5% (n = 284) of symptomatic cases. Most cases of reinfection occurred during the Omicron period (n = 251; 88%), representing a significant increase on the SARS-CoV-2 reinfection rate before and during the Omicron variant period (0.8% vs. 4.3%; p < 0.001). The mean interval between SARS-CoV-2 infections was 429 days (ranged from 122 to 674). The Omicron variant spread faster than Gamma and Delta variant. All SARS-CoV-2 reinfections were mild cases.
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https://observatorio.fm.usp.br/handle/OPI/53932
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Coleções
Artigos e Materiais de Revistas Científicas - FM/MIP
Artigos e Materiais de Revistas Científicas - COVID-19
Artigos e Materiais de Revistas Científicas - HC/ICHC
Artigos e Materiais de Revistas Científicas - HC/IPq
Artigos e Materiais de Revistas Científicas - LIM/03
Artigos e Materiais de Revistas Científicas - LIM/49
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