Publication date: Aug 28, 2023
This study aimed to investigate the deaths due to coronavirus disease 2019 (COVID-19) reinfection and related risk factors. National cohort data were collected for a six-month period when omicron BA. 1/BA. 2 variant was dominant in South Korea. The long-term care facility residents (adjusted odds ratio, 3. 11; 95% confidence interval [CI], 2. 98-3. 25) had significantly higher risk of reinfection than the general population. The risk of reinfection was significantly lower for persons with 2 or more vaccine doses compared to the unvaccinated. The risk of death was significantly higher in the reinfection group than in the primary infection group for persons in the 60-74 years age group (adjusted relative risk [aRR], 1. 62; 95% CI, 1. 19-2. 20), and immunocompromised group (aRR, 4. 56; 95% CI, 2. 34-8. 90). In these data, vaccination history was significantly related to reduced COVID-19 reinfection and severe progression, and scheduled vaccinations were important even with a history of infection.
|SARS-CoV-2 Omicron Variant|