Early SARS-CoV-2 Reinfections within 60 Days and Implications for Retesting Policies |
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| Authors: | Louis Nevejan,Lize Cuypers,Lies Laenen,Liselotte Van Loo,Franç ois Vermeulen,Elke Wollants,Ignace Van Hecke,Stefanie Desmet,Katrien Lagrou,Piet Maes,Emmanuel André |
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| Affiliation: | University Hospitals Leuven, Leuven, Belgium (L. Nevejan, L. Cuypers, L. Laenen, L. Van Loo, F. Vermeulen, I. Van Hecke, S. Desmet, K. Lagrou, E. André);Rega Institute, Katholieke Universiteit Leuven, Leuven (E. Wollants, S. Desmet, K. Lagrou, P. Maes, E. André) |
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| Abstract: | Illustrated by a clinical case supplemented by epidemiologic data, early reinfections with SARS-CoV-2 Omicron BA.1 after infection with Delta variant, and reinfection with Omicron BA.2 after Omicron BA.1 infection, can occur within 60 days, especially in young, unvaccinated persons. The case definition of reinfection, which influences retesting policies, should be reconsidered. |
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| Keywords: | COVID-19 SARS-CoV-2 reinfections testing policies epidemiology vaccination coronavirus disease severe acute respiratory syndrome coronavirus 2 viruses respiratory infections zoonoses Belgium |
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