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Effect of the human papillomavirus vaccine on the risk of genital warts: a nationwide cohort study of Korean adolescent girls
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Jaeyoung Cho, Eun Mi Kim, Jihye Kim, Ju-Young Shin, Eui Hyeok Kim, Jong Heon Park, Seunghyun Lewis Kwon, Geun-Yong Kwon, Soon-Ae Shin, Jaiyong Kim
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Epidemiol Health. 2024;46:e2024040. Published online March 18, 2024
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DOI: https://doi.org/10.4178/epih.e2024040
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Abstract
OBJECTIVES
The purpose of this study was to assess the effectiveness of human papillomavirus (HPV) vaccination administered to adolescent girls through Korea’s National Immunization Program.
METHODS This retrospective cohort study included patients who were 12-13 years old, whether vaccinated or unvaccinated, between July 2016 and December 2017. The incidence of genital warts (GWs) was monitored through 2021. Time-stratified hazard ratios (HRs) were estimated, adjusting for birth year, socioeconomic status, and the level of urbanization of the region, and were presented with 95% confidence intervals (CIs). Data were sourced from the Immunization Registry Integration System, linked with the National Health Information Database.
RESULTS The study included 332,062 adolescent girls, with an average follow-up period of approximately 4.6 years. Except for the first year, the HRs for the vaccinated group were lower than those for the unvaccinated group. The HRs for specific cut-off years were as follows: year 2, 0.62 (95% CI, 0.31 to 1.13); year 3, 0.58 (95% CI, 0.35 to 0.96); and year 4 and beyond, 0.39 (95% CI, 0.28 to 0.52).
CONCLUSIONS Our findings indicate that HPV vaccination was associated with a reduction in the risk of GWs among adolescent girls. Notably, this reduction became significant as the incidence of GWs increased with age.
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Summary
Korean summary
이 연구는 후향적 코호트 연구로써, HPV 예방접종이 한국의 여자 청소년에서 생식기사마귀 질환의 위험을 감소시키는 것과 연관성이 있다는 것을 보여주었다. 따라서 단기적으로 한국의 국가예방접종 사업은 생식기사마귀 질환에 있어 효과가 있었다고 볼 수 있다. 향후에는 전암성 병변 또는 암 등과 같은 심각한 질환에 대한 백신의 영향을 확인할 필요가 있다.
Key Message
In this retrospective cohort study, our results demonstrated that HPV vaccination is associated with a reduction in the risk of GWs among adolescent girls. In the short term, the NIP of Korea can be considered effective in providing protection against GWs. Future studies need to analyze the impact of vaccines on more serious diseases such as precancerous lesions or cancer.
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Parental concerns about COVID-19 vaccine safety and hesitancy in Korea: implications for vaccine communication
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Hye-Kyung Cho, Hyunju Lee, Young June Choe, Shinkyeong Kim, Sujin Seo, Jiwon Moon, Eun Hwa Choi, Geun-Yong Kwon, Jee Yeon Shin, Sang-Yoon Choi, Mi Jin Jeong, Myoungsoon You
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Epidemiol Health. 2023;45:e2023004. Published online December 13, 2022
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DOI: https://doi.org/10.4178/epih.e2023004
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Abstract
Summary
PDF
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Abstract
OBJECTIVES
Vaccination is one of the most important strategies to contain the spread of coronavirus disease 2019 (COVID-19). Vaccination in children is dependent on their parents, making it important to understand parents’ awareness and attitudes toward vaccines in order to devise strategies to raise vaccination rates in children.
METHODS A web-based nationwide survey was conducted among Korean parents of 7-year-old to 18-year-old children in August 2021 to estimate parents’ intention to vaccinate their children against COVID-19 and identify key factors affecting parental acceptance and hesitancy through regression analysis.
RESULTS Approximately 56.4% (575/1,019) were willing to vaccinate their children against COVID-19. Contributing factors to COVID-19 vaccine hesitancy were being a mother (adjusted odds ratio [aOR], 0.36; 95% confidence interval [CI], 0.25 to 0.52), a lower education level (aOR, 0.83; 95% CI, 0.70 to 0.97), hesitancy to other childhood vaccines (aOR, 0.78; 95% CI, 0.64 to 0.96), and refusal to vaccinate themselves (aOR, 0.08; 95% CI, 0.02 to 0.20). Having older children (aOR, 1.20; 95% CI, 1.13 to 1.28), trusting the child’s doctor (aOR, 1.19; 95% CI, 1.07 to 1.32), positive perceptions of the COVID-19 vaccine’s effectiveness (aOR, 2.60; 95% CI, 1.90 to 3.57) and perceiving the COVID-19 vaccine as low-risk (aOR, 1.68; 95% CI, 1.27 to 2.24) were associated with COVID-19 vaccine acceptance. Concerns about adverse reactions were the most common cause of hesitancy.
CONCLUSIONS Providing parents with accurate and reliable information on vaccine effectiveness and safety is important to increase COVID-19 vaccine uptake in children. Differential or targeted approaches to parents according to gender, age, and their children’s age are necessary for effective communication about vaccination in children.
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Summary
Korean summary
부모에게 백신 효과와 안전성에 대한 정확하고 믿을만한 정보를 제공하는 것이 소아 코로나19 백신 접종률을 높이는데 중요하다. 자녀의 백신 접종에 대한 의사소통을 효율적으로 하기 위해서는 부모의 성별과 연령, 자녀의 연령을 고려한 차별적인 접근 방법이 필요하다.
Key Message
To improve COVID-19 vaccine uptake in children, it's crucial to provide parents with reliable and precise information about vaccine safety and effectiveness. Targeted communication strategies that consider factors such as the age of the parents and their children, as well as gender, may be necessary to effectively convey this information.
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Citations
Citations to this article as recorded by  - Safety of BNT162b2 mRNA COVID-19 vaccine in children with chronic kidney disease: a national population study from South Korea
Young June Choe, Yo-Han Ahn, Eunsun Gwak, Eunseo Jo, Jinseob Kim, Seung-Ah Choe
Pediatric Nephrology.2024; 39(2): 625. CrossRef - Assessing the determinants of influenza and COVID-19 vaccine co-administration decisions in the elderly
Seunghyun Lewis Kwon, So-Yeon Kim, Minju Song, Hyung-Min Lee, Seon-Hwa Ban, Mi-Soon Lee, Hyesun Jeong
Human Vaccines & Immunotherapeutics.2024;[Epub] CrossRef - Descriptive cross-sectional study to evaluate perception, attitude, and practice of parents regarding COVID-19 vaccination in children 10–12 years of age—A step toward prevention of future COVID-19 outbreaks in India
Vivek Mehta, Deep Inder, Pawan Kumar, Anupma Raheja
Journal of Family Medicine and Primary Care.2024; 13(5): 2104. CrossRef - Comparative safety of monovalent and bivalent mRNA COVID-19 booster vaccines in adolescents aged 12 to 17 years in the Republic of Korea
Mijeong Ko, Seontae Kim, Seok-Kyoung Choi, Seung Hwan Shin, Yeon-Kyeng Lee, Yunhyung Kwon
Osong Public Health and Research Perspectives.2024; 15(4): 364. CrossRef - Pediatric asthma and COVID-19 vaccination: unveiling patterns of hesitancy and acceptance
Marzieh Tavakol, Saber Gharagozlou, Mohammad Abbasi, Zahra Zamani, Mohammad Gharagozlou
Therapeutic Advances in Vaccines and Immunotherapy.2024;[Epub] CrossRef - Willingness and hesitancy of parents to vaccinate against COVID-19 their children ages 6 months to 4 years with frail conditions in Italy
Grazia Miraglia del Giudice, Giorgia Della Polla, Mario Postiglione, Italo Francesco Angelillo
Frontiers in Public Health.2023;[Epub] CrossRef - Associations between Socio-Demographic Characteristics and Maternal Attitudes towards Childhood Vaccination in Cyprus—A Cross-Sectional Survey
Maria Kyprianidou, Georgia Fakonti, Eleana Tzira, Magdalini Pylli, Konstantinos Giannakou
COVID.2023; 3(7): 1042. CrossRef
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