• J. Korean Med. Sci. · Aug 2023

    Risk Factors Related to COVID-19 Reinfection and Fatality During the Omicron (BA.1/BA.2) Period in Korea.

    • Ju Hee Lee, Ji Hae Hwang, Eun Jung Jang, Ryu Kyung Kim, Kil Hun Lee, Seon Kyeong Park, Jin Gwack, and Young Joon Park.
    • Division of Epidemiological Investigation Analysis, Korea Disease Control and Prevention Agency, Cheongju, Korea.
    • J. Korean Med. Sci. 2023 Aug 28; 38 (34): e269e269.

    BackgroundThis study aimed to investigate the deaths due to coronavirus disease 2019 (COVID-19) reinfection and related risk factors.MethodsNational cohort data were collected for a six-month period when omicron BA.1/BA.2 variant was dominant in South Korea.ResultsThe 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).ConclusionIn 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.© 2023 The Korean Academy of Medical Sciences.

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