ArticlePloS one2022
The impact of free vaccination policies under the Korean Influenza National Immunization Program: Trends in influenza vaccination rates in South Korea from 2010 to 2019.
Article in PloS one, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.
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17 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Barriers to influenza vaccination in older adults with chronic diseases: Insights from a COM-B model-based meta-analysis.Human vaccines & immunotherapeutics · 2025Pooled it
- A Human Mobility-Based Modeling Study of Influenza Vaccination Strategies Across Socioeconomically Disparate Regions in China.Vaccines · 2026Article
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- Socioeconomic differences in influenza vaccination coverage by government financial support status: A population-based study in Korea.PloS one · 2026Article
- Predictive model of public health impact of herpes zoster vaccination and related costs for adults aged ≥50 years in Republic of Korea.Human vaccines & immunotherapeutics · 2025Article
- 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
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- Socioeconomic disparities in influenza vaccination uptake: impact of the COVID-19 pandemic in South Korea.BMC public health · 2025Article
- Why do older adults hesitate to get the flu vaccine? A cross-sectional study on vaccine hesitancy in the post-COVID-19 era.Frontiers in public health · 2025Article
- Disentangling behavioral determinants of seasonal influenza vaccination in post-corona era: An integrated model approach.PloS one · 2025Article
- Cost-effectiveness of the adjuvanted quadrivalent influenza vaccine for older adults in South Korea.Human vaccines & immunotherapeutics · 2024Article
- Differences of respiratory mechanics in mechanical ventilation of acute respiratory distress syndrome between patients with COVID-19 and Influenza A.Respiratory research · 2024Article
- Influenza vaccination trend and related factors among patients with diabetes in Korea: Analysis using a nationwide database.Frontiers in endocrinology · 2023Observational
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- The effectiveness of influenza vaccine among elderly Chinese: A regression discontinuity design based on Yinzhou regional health information platform.Human vaccines & immunotherapeutics · 2022Article
- Article
- Article
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Abstract
backgroundAnnual vaccination for influenza is recommended for high-risk populations for its high morbidity and mortality. South Korea provides free influenza vaccination to some target groups under the National Immunization Program (NIP), and discrepantly high vaccination rates are observed in such populations. In this study, we analyzed the trends in influenza vaccination rates and evaluated the impact of the recent expansion of financial coverage to children ≤12 years and pregnant women.
methodsWe conducted a cross-sectional study with nationwide survey data from Korea National Health and Nutrition Examination Survey (KNHANES). From 2010 to 2019, we evaluated the trends in influenza vaccination rates of the following four target groups: children ≤12 years, adults ≥65 years, pregnant women, and people with chronic diseases.
resultsIn total, 80,861 individuals were analyzed. From 2017 to 2019, the vaccination coverage of children ≤12 years increased from 66.2% to 83.1%; pregnant women from 44.1% to 68.5% (comparing the mean of 2010-2017 and 2018-2019, P <0.001 for both). The elderly ≥65 years showed the highest rates (85.8% in 2019), while people with chronic diseases marked the lowest (41.9% in 2019). People with liver diseases showed the lowest vaccination rate of 27.8%, while that of other common diseases ranged between 31.7-44.1%.
conclusionThe discrepancy between target groups corresponds to their financial coverage under NIP. The recent expansion of financial aids to children ≤12 years and pregnant women was followed by significant increases in vaccination rates in both groups. We suggest that free vaccination policy is one of the most effective strategies to enhance vaccination coverage, and we call for its expansion to other under-vaccinated target groups, especially people with chronic diseases.
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