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1 "Yoo-Yeon Kim"
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Presumed population immunity to SARS-CoV-2 in South Korea, April 2022
Eun Jung Jang, Young June Choe, Seung Ah Choe, Yoo-Yeon Kim, Ryu Kyung Kim, Jia Kim, Do Sang Lim, Ju Hee Lee, Seonju Yi, Sangwon Lee, Young-Joon Park
Osong Public Health Res Perspect. 2022;13(5):377-381.   Published online October 14, 2022
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Graphical AbstractGraphical Abstract AbstractAbstract PDF
We estimated the overall and age-specific percentages of the Korean population with presumed immunity against severe acute respiratory syndrome coronavirus 2 (SARSCoV-2) as of April 2022 using the national registry.
We used the national coronavirus disease 2019 (COVID-19) infection and vaccination registry from South Korea, as described to define individuals with a previous history of COVID-19 infection, vaccination, or both, as persons with presumed immunity.
Of a total of 53,304,627 observed persons, 24.4% had vaccination and infection, 58.1% had vaccination and no infection, 7.6% had infection and no vaccination, and 9.9% had no immunity. The SARS-CoV-2 Omicron variant emerged at a time when the presumed population immunity ranged from 80% to 85%; however, nearly half of the children were presumed to have no immunity.
We report a gap in population immunity, with lower presumed protection in children than in adults. The approach presented in this work can provide valuable informed tools to assist vaccine policy-making at a national level.


Citations to this article as recorded by  
  • Realistic Estimation of COVID-19 Infection by Seroprevalence Surveillance of SARS-CoV-2 Antibodies: An Experience From Korea Metropolitan Area From January to May 2022
    In Hwa Jeong, Jong-Hun Kim, Min-Jung Kwon, Jayoung Kim, Hee Jin Huh, Byoungguk Kim, Junewoo Lee, Jeong-hyun Nam, Eun-Suk Kang
    Journal of Korean Medical Science.2024;[Epub]     CrossRef
  • Epidemiology of Coronavirus Disease 2019 in Infants and Toddlers, Seoul, South Korea
    JiWoo Sim, Euncheol Son, Young June Choe
    Pediatric Infection & Vaccine.2024; 31(1): 94.     CrossRef
  • Predicting adherence to COVID-19 preventive measures among South Korean adults aged 40 to 69 Years using the expanded health empowerment model
    Su-Jung Nam, Tae-Young Pak
    SSM - Population Health.2023; 22: 101411.     CrossRef
  • Acute COVID-19 in unvaccinated children without a history of previous infection during the delta and omicron periods
    Jee Min Kim, Ji Yoon Han, Seung Beom Han
    Postgraduate Medicine.2023; 135(7): 727.     CrossRef

PHRP : Osong Public Health and Research Perspectives