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.
Keywords: COVID-19; Health Personnel; Risk Reduction Behavior; Severe Acute Respiratory Syndrome Coronavirus 2.
© 2021. The Author(s).