ArticleFrontiers in public health2026
Hepatitis A serostatus and vaccination outcomes after on-campus education and point-of-care antibody testing.
Article in Frontiers in public health, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Susceptibility to hepatitis A virus (HAV) remains high among young adults in Korea, reflecting birth-cohort effects and vaccination history. Because foodborne transmission has contributed to outbreaks, students in food and nutrition or culinary arts represent a relevant target group as future food handlers. We aimed to estimate anti-HAV immunoglobulin G (IgG) seroprevalence, describe pre- to post-intervention changes in knowledge, perceptions and vaccination intention and report two-dose vaccination completion and its correlates. Methods: From April 2023 to December 2024, we conducted a campus-based hepatitis A prevention program at four universities. Students completed a baseline questionnaire before the session and a post-intervention questionnaire immediately after the education session and same-visit POCT result feedback. Students who were IgG-negative and had no verified prior two-dose vaccination in the national Immunization Registry Information System (IRIS) were referred to public health centers for no-cost vaccination. Two-dose completion was defined as IRIS documentation of a second HAV vaccine dose by the study end date. We modeled anti-HAV IgG positivity using mixed-effects logistic regression with an institution-level random intercept, and series completion (and correlates) using modified Poisson regression with institution-clustered robust standard errors. Results: Of 692 participants who underwent anti-HAV IgG POCT, 188 (27.2%) were IgG-positive and 504 (72.8%) IgG-negative. Among IgG-negative participants, 37 had documented prior two-dose vaccination and were not vaccine-eligible. The remaining 467 were vaccine-eligible (0 dose Conclusion: In a cohort of future food handlers with a susceptibility gap, a campus-based program integrating standardized education with same-visit anti-HAV IgG testing and vaccination record verification achieved high two-dose completion among those without evidence of protection. These findings inform targeted young-adult hepatitis A prevention strategies by using on-site triage to focus counseling and referral on susceptible individuals and reduce reliance on off-site testing and return visits. Comparative studies are needed to assess the incremental value and cost-effectiveness of on-site testing and serostatus feedback.
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