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논문 기본 정보

자료유형
학술저널
저자정보
Yu Mi Wi (Sungkyunkwan University School of Medicine) Si-Ho Kim (Sungkyunkwan University School of Medicine) 백경란 (성균관대학교)
저널정보
대한의학회 Journal of Korean Medical Science Journal of Korean Medical Science Vol.37 No.4
발행연도
2022.1
수록면
1 - 6 (6page)
DOI
10.3346/jkms.2022.37.e28

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초록· 키워드

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Background: A rapid decline in immunity and low neutralizing activity against the delta variant in severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccinees has been observed. This study describes an outbreak of coronavirus disease 2019 (COVID-19) breakthrough infections caused by the SARS-CoV-2 delta variant in a psychiatric closed ward. Methods: Data from epidemic intelligence service officers were utilized to obtain information regarding demographic, vaccination history, and clinical data along with SARSCoV-2 PCR test results for a COVID-19 outbreak that occurred in a closed psychiatric ward. Results: Among the 164 residents, 144 (87.8%) received two doses of vaccines and 137 (95.1%) of them received ChAdOx1 nCoV-19 vaccine. The mean interval between the second vaccination and COVID-19 diagnosis was 132.77 ± 40.68 days. At the time of detection of the index case, SARS-CoV-2 had spread throughout the ward, infecting 162 of 164 residents. The case-fatality ratio was lower than that in the previously reported outbreak before the vaccination (1.2%, 2/162 vs. 6.9%, P = 0.030). Prolonged hospitalization occurred in 17 patients (11.1%) and was less prevalent in the vaccinated group than in the unvaccinated group (8.5% vs. 25.0%, P = 0.040). Conclusion: The findings of this study highlight that while vaccination can reduce mortality and the duration of hospitalization, it is not sufficient to prevent an outbreak of the SARSCoV-2 delta variant in the present psychiatric hospital setting.

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