1. Rate of reinfections after SARS-CoV-2 primary infection in the population of an Italian province: a cohort study.
- Author
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Flacco, M E, Martellucci, C Acuti, Soldato, G, Carota, R, Fazii, P, Caponetti, A, and Manzoli, L
- Subjects
HEALTH policy ,COVID-19 ,TIME ,REINFECTION ,RETROSPECTIVE studies ,DISEASE incidence ,ACQUISITION of data ,MEDICAL records ,DESCRIPTIVE statistics ,POLICY sciences ,LONGITUDINAL method - Abstract
Background Current data suggest that severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) reinfections are rare, but no information are available on minors and after 12 months of follow-up. Methods This retrospective cohort study included all the population of an Italian Province, diagnosed with a SARS-CoV-2 infection from March 2020 to May 2021. The primary outcome was the incidence of a reinfection, defined as a new positive polymerase chain reaction (PCR) test occurring ≥90 days after complete resolution of the first infection, and data were retrieved from the official datasets (coronavirus disease 2019 [COVID-19], demographic, hospital and co-pay exemption) of the Local Health Unit (LHU) of Pescara. Results After an average of 201 days of follow-up (max. 414), we recorded 24 reinfections ≥90 days after the resolution of the first 7173 infections (0.33%). Four reinfections required hospitalization, one was lethal. Most of the reinfections (n = 13) occurred 6–9 months after the resolution of the first infection; no new infection was detected 12 or more months later and among the 832 minors. Conclusions This study confirms previous findings on a low risk of SARS-CoV-2 reinfection. If confirmed, these findings suggest that more targeted restriction policies can be applied to the subjects that recovered after a first infection. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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