DAVIS, R.; WRIGHT, P. Circulating Vaccine Derived Poliovirus and the polio eradication endgame. Pan African Medical Journal, [S. l.], v. 12, n. 1, 2013. DOI: 10.4314/pamj.v12i1. Disponível em: https://www.ajol.info/index.php/pamj/article/view/85924. Acesso em: 30 sep. 2026.