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논문 기본 정보

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학술저널
저자정보
Mi Yu (Division of Epidemiological Investigation Korea Disease Control and Prevention Agency Cheongju Republic of Korea) Sang-Eun Lee (Division of Epidemiological Investigation Korea Disease Control and Prevention Agency Cheongju Republic of Korea) Hye Young Lee (Division of Epidemiological Investigation Korea Disease Control and Prevention Agency Cheongju Republic of Korea) Hye-jin Kim (Division of Epidemiological Investigation Korea Disease Control and Prevention Agency Cheongju Republic of Korea) Yeong-Jun Song (Division of Epidemiological Investigation Korea Disease Control and Prevention Agency Cheongju Republic of Korea) Jian Jeong (Division of Epidemiological Investigation Korea Disease Control and Prevention Agency Cheongju Republic of Korea) Ae Kyung Park (Division of Emerging Infectious Diseases Bureau of Infectious Diseases Diagnosis Control Korea Disease Control and Prevention Agency Cheongju Republic of Korea) Il-Hwan Kim (Division of Emerging Infectious Diseases Bureau of Infectious Diseases Diagnosis Control Korea Disease Control and Prevention Agency Cheongju Republic of Korea) Eun-jin Kim (Division of Emerging Infectious Diseases Bureau of Infectious Diseases Diagnosis Control Korea Disease Control and Prevention Agency Cheongju Republic of Korea) Young-Joon Park (Division of Epidemiological Investigation 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
173 - 179 (7page)
DOI
10.24171/j.phrp.2022.0285

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초록· 키워드

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Objectives: This study aimed to assess the contact tracing outcomes of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) Omicron sub-lineages BA.4, BA.5, and BA.2.75 within Republic of Korea, and to generate foundational data for responding to future novel variants.Methods: We conducted investigations and contact tracing for 79 confirmed BA.4 cases, 396 confirmed BA.5 cases, and 152 confirmed BA.2.75 cases. These cases were identified through random sampling of both domestically confirmed and imported cases, with the goal of evaluating the pattern of occurrence and transmissibility.Results: We detected 79 instances of Omicron sub-lineage BA.4 across a span of 46 days, 396 instances of Omicron sub-lineage BA.5 in 46 days, and 152 instances of Omicron sub-lineage BA.2.75 over 62 days. One patient with severe illness was confirmed among the BA.5 cases; however, there were no reports of severe illness in the confirmed BA.4 and BA.2.75 cases. The secondary attack risk among household contacts were 19.6% for BA.4, 27.8% for BA.5, and 24.3% for BA.2.75. No statistically significant difference was found between the Omicron sub-lineages.Conclusion: BA.2.75 did not demonstrate a higher tendency for transmissibility, disease severity, or secondary attack risk within households when compared to BA.4 and BA.5. We will continue to monitor major SARS-CoV-2 variants, and we plan to enhance the disease control and response systems.

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