Assessing the Impact of Polio Eradication Initiative and Routine Immunization in Zamfara State, North‑West, Nigeria. Nigerian Journal of Health Sciences, [S. l.], v. 15, n. 1, p. 27–29, 2023. Disponível em: https://nigerianhsjournal.ng/index.php/njhs/article/view/124. Acesso em: 25 feb. 2026.