Published in:
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.