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논문 기본 정보

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학술저널
저자정보
Seonhee Ahn (Division of Infectious Disease Response Gyeongbuk Regional Disease Response Center Korea Disease Control and Prevention Agency Daegu Republic of Korea) Tae Jong Son (Division of Infectious Disease Response Gyeongbuk Regional Disease Response Center Korea Disease Control and Prevention Agency Daegu Republic of Korea) Yoonsuk Jang (Division of Infectious Disease Response Gyeongbuk Regional Disease Response Center Korea Disease Control and Prevention Agency Daegu Republic of Korea) Jihyun Choi (Epidemiological Investigation Team Korea Disease Control and Prevention Agency Cheongju Republic of Korea) Young Joon Park (Epidemiological Investigation Team Korea Disease Control and Prevention Agency Cheongju Republic of Korea) Jiseon Seong (Division of Infectious Disease Control Daegu Metropolitan City Hall Daegu Republic of Korea) Hyun Hee Kwon (Department of Internal Medicine Daegu Catholic University School of Medicine Daegu Republic of Korea) Muk Ju Kim (Department of Infectious Disease Daegu Catholic University Medical Center Daegu Republic of Korea) Donghyok Kwon (Division of Public Health Emergency Response Research Korea Disease Control and Prevention Agency Cheongju Republic of Korea)
저널정보
질병관리본부 Osong Public Health and Research Persptectives Osong Public Health and Research Perspectives 제14권 제3호
발행연도
2023.6
수록면
188 - 196 (9page)
DOI
10.24171/j.phrp.2023.0066

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Objectives: Healthcare facilities are high-risk sites for infection. This study analyzed the epidemiological characteristics of a coronavirus disease 2019 (COVID-19) outbreak in a tertiary hospital after COVID-19 vaccination had been introduced in Republic of Korea. Vaccine effectiveness (VE) and shared anti-infection strategies are also assessed.Methods: The risk levels for 4,074 contacts were evaluated. The epidemiological characteristics of confirmed cases were evaluated using the chi-square test. The “1 minus relative risk” method was used to determine VE in preventing infection, progression to severe disease, and death. In the largest affected area (the 8th floor), a separate relative risk analysis was conducted. A multivariate logistic regression analysis (with 95% confidence interval [CIs]) was used to identify transmission risk factors with a significance level <10% via the backward elimination method.Results: In total, 181 cases of COVID-19 were confirmed, with an attack rate of 4.4%. Of those cases, 12.7% progressed to severe disease, and 8.3% died. In the cohort isolation area on the 8th floor, where 79.0% of the confirmed cases occurred, the adjusted odds ratio was 6.55 (95% CI, 2.99–14.33) and 2.19 (95% CI, 1.24–3.88) for caregivers and the unvaccinated group, respectively. VE analysis revealed that 85.8% of the cases that progressed to severe disease and 78.6% of the deaths could be prevented by administering a second vaccine.Conclusion: Caregiver training for infection prevention and control is necessary to reduce infection risk. Vaccination is an important intervention to reduce the risk of progression to severe disease and death.

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