Impact of Maternal Factors on Vertical HIV Transmission in Jigawa State, Nigeria: A Multilevel Analysis of Antenatal Care and Knowledge of HIV Status. International Journal of Development Mathematics (IJDM), [S. l.], v. 2, n. 1, p. 244–250, 2025. DOI: 10.62054/ijdm/0201.19. Disponível em: https://ijdm.org.ng/index.php/Journals/article/view/155.. Acesso em: 12 jul. 2026.