PHWR Public Health Weekly Report

Vol.15 No.41, October 13, 2022 Article TypeQuickStatsSurveillance Reports

• Surveillance Reports 2022-10-13

  0 4150 456

  Secondary Attack Rate and Vaccine Effectiveness Against Omicron Sub-lineage Transmissions from Index Cases to Household Contacts in Gyeongbuk

  Hanul Park, Chungmin Park, Myung-Jae Hwang, Seong-Ju Choi, Tae Jong Son*

  Public Health Weekly Report 2022; 15(41): 2695-2703 https://doi.org/10.56786/PHWR.2022.15.41.2695

  Abstract

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  On November 30, 2021, the first case of omicron variants with fast transmission and immune avoidance characteristics against vaccines was confirmed in the Republic of Korea. The omicron variants have been recently classified and reported in detail as BA.1.1, BA.2, BA.3, BA.4, and BA.5. For approximately 2 months from April 24 to June 27, 2022, we confirmed the secondary attack rate and vaccine effectiveness against transmission (VET) in 82 confirmed cases of the omicron sub-lineage virus (BA.2.12.1, BA.4, and BA.5) and 156 household. In our study, the secondary attack rate by detailed lineage was the highest in the BA.4 variant (42.86%), followed by BA.2.12.12.1 (41.18%) and BA.5 (37.36%) variants. Regarding the BA.5 variant, the secondary attack rate was the highest among unvaccinated persons (45.45%), followed by those who had received three (35.94%) and two (33.33%) vaccine doses. When VET was confirmed, the two doses group had a VET of 30% and the three doses group had 37% compared with the unvaccinated group. But, it was not significant. The two doses group had a VET of 30% and the three doses group had 37% compared with the unvaccinated group. Our study is meaningful because it confirmed the secondary attack rate and vaccine effectiveness against Omicron sub-lineage transmissions from index cases to household contacts in Gyeongbuk.

• QuickStats 2022-10-13

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  Overweight or Obesity Rates in OECD Countries in 2020

  Public Health Weekly Report 2022; 15(41): 2704-2705 https://doi.org/10.56786/PHWR.2022.15.41.2704

  

  

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