The State of Human Papillomavirus (HPV) Vaccination Among Secondary School Adolescents in Nnewi, Nigeria Prior to Free Routine HPV Vaccine Rollout. NIGERIAN JOURNAL OF PAEDIATRICS, [S. l.], v. 51, n. 3, p. 241–250, 2024. DOI: 10.4314/njp.v51i3.02. Disponível em: https://njpaediatrics.com/index.php/njp/article/view/1190.. Acesso em: 15 may. 2026.