ArticlePloS one2023
The impact of the COVID-19 pandemic and the expansion of free vaccination policy on influenza vaccination coverage: An analysis of vaccination behavior in South Korea.
Article in PloS one, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed, 14 citations in OpenAlex.
- Impact of coronavirus disease 2019 nonpharmaceutical interventions on influenza epidemiology: A retrospective analysis in Hebei Province, China from 2019 to 2023.The Journal of international medical research · 2026Article
- The Determinants of Influenza Vaccine Uptake in Pregnant Women During the COVID-19 Pandemic Using the Theory of Planned Behavior: A Cross-Sectional Study.Maternal and child health journal · 2025Article
- Article
- Socioeconomic disparities in influenza vaccination uptake: impact of the COVID-19 pandemic in South Korea.BMC public health · 2025Article
- Disentangling behavioral determinants of seasonal influenza vaccination in post-corona era: An integrated model approach.PloS one · 2025Article
- The impact of the COVID-19 pandemic and the free vaccination policy on seasonal influenza vaccination uptake among older adults in Ningbo, Eastern China.Human vaccines & immunotherapeutics · 2024Article
- Analysis of the incidence of influenza before and after the COVID-19 pandemic in South Korea.Tropical medicine & international health : TM & IH · 2024Article
- Association Between Sociodemographic Factors and Vaccine Acceptance for Influenza and SARS-CoV-2 in South Korea: Nationwide Cross-Sectional Study.JMIR public health and surveillance · 2024Article
- Article
- Article
- Vaccine uptake, associated factors and reasons for vaccination status among the South African elderly; findings and next steps.PloS one · 2024Article
- Distinguishing COVID-19 from seasonal influenza in patients under age 65 years-a retrospective observational cohort study comparing the 2009 influenza A (H1N1) and 2022 SARS-CoV-2 pandemics.Frontiers in cellular and infection microbiology · 2023Observational
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3 authors at 1 institution in 1 country.
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Abstract
backgroundAnnual vaccination for influenza is globally recommended for some prioritized groups due to its high morbidity and mortality. Until 2019, South Korea has provided free influenza vaccination to children aged ≤12, adults aged ≥65, and pregnant women to enhance vaccination coverage. In 2020, with the COVID-19 pandemic, free flu vaccination was temporarily broadened to adults aged 62-64 and children aged 13-18. We analyzed the trends in influenza vaccination coverages in South Korea and evaluated the impact of the COVID-19 pandemic and the expansion of the free vaccination policy on influenza vaccination coverage.
methodsWe conducted a cross-sectional study with nationwide survey data from Korea National Health and Nutrition Examination Survey (KNHANES). We evaluated the trends in influenza vaccination coverages of target populations from 2010 to 2020. Influenza vaccination coverages of children aged 13-18, adults aged 62-64, and adults aged ≥65 were compared between 2019 and 2020.
resultsIn total, 72,443 individuals were analyzed. From 2019 to 2020, with the expansion of free influenza vaccination and the COVID-19 pandemic, the vaccination coverage of children aged 13-18 increased from 27.8% to 43.5% (P<0.001) but that of people aged 62-64 showed insignificant change from 57.4% to 51.5% (P = 0.266). Furthermore, the vaccination coverage in adults aged ≥65 declined from 87.2% to 79.1% (P<0.001).
conclusionIn 2020, along with COVID-19 outbreaks, a decline of influenza vaccination coverage in older adults was observed regardless of free immunizations. It is likely due to behavioral changes to reduce the risk of COVID-19 transmission. This is supported by a greater reduction of influenza vaccination coverage in regions with higher COVID-19 outbreaks, as well as by South Korea's high medical accessibility and highly congested medical facilities. To sustain a high level of vaccination coverage of high-risk population during epidemics, additional efforts beyond free vaccination policies should be implemented.
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