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Published in: BMC Infectious Diseases 1/2021

Open Access 01-12-2021 | SARS-CoV-2 | Research

Symptomatic SARS-COV-2 reinfection: healthcare workers and immunosuppressed individuals at high risk

Authors: Efrén Murillo-Zamora, Xóchitl Trujillo, Miguel Huerta, Mónica Ríos-Silva, Felipe Aguilar-Sollano, Oliver Mendoza-Cano

Published in: BMC Infectious Diseases | Issue 1/2021

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Abstract

Background

Knowledge regarding factors predicting the SARS-COV-2 reinfection risk is scarce and it has major implications in public health policies. We aimed to identify factors associated with the risk of symptomatic SARS-COV-2 reinfection.

Methods

We conducted a nationwide retrospective cohort study and 99,993 confirmed cases of COVID-19 were analyzed.

Results

The overall risk of reinfection (28 or more elapsed days between both episodes onset) was 0.21% (incidence density, 2.5 reinfections per 100,000 person-days) and older subjects and those with the mild primary disease were at reduced risk of the event. Healthcare workers and immunosuppressed or renal patients had at greater risk of SARS-COV-2 reinfection.

Conclusions

If replicated in other populations, these results may be useful to prioritize efforts focusing on the reduction of SARS-COV-2 spread and the related burden.
Literature
Metadata
Title
Symptomatic SARS-COV-2 reinfection: healthcare workers and immunosuppressed individuals at high risk
Authors
Efrén Murillo-Zamora
Xóchitl Trujillo
Miguel Huerta
Mónica Ríos-Silva
Felipe Aguilar-Sollano
Oliver Mendoza-Cano
Publication date
01-12-2021
Publisher
BioMed Central
Published in
BMC Infectious Diseases / Issue 1/2021
Electronic ISSN: 1471-2334
DOI
https://doi.org/10.1186/s12879-021-06643-1

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