Clinical Features of Patients with COVID-19 Recurrence During Hospitalization in the Omicron Variant Surge.

Background: Repeat positive results for SARS-CoV-2 by antigen detection test/RT-PCR in recovered COVID-19 patients were not very rare even when omicron variants became dominant, but the clinical features of patients with recurrent COVID-19 during hospitalization are still unclear.

Methods: The clinical characteristics of patients with recurrent COVID-19 during hospitalization were retrospectively investigated from January 2023 to December 2023.

Results: Recurrence of COVID-19 was found in 7 of 275 (2.