High Prevalence of Hepatitis B Among Secondary School Students: Implications for Vaccination Programs and Public Health. JPK : Jurnal Proteksi Kesehatan, [S. l.], v. 14, n. 2, 2025. Disponível em: https://jurnal.polkesri.ac.id/index.php/JPK/article/view/913. Acesso em: 10 jan. 2026.