ALIPON, SweetC B et al. Emergence of vaccine-derived poliovirus type 2 after using monovalent type 2 oral poliovirus vaccine in an outbreak response, Philippines. Western Pacific Surveillance and Response, Manila, Philippines, v. 13, n. 2, 2022. DOI: 10.5365/wpsar.2022.13.2.904. Disponível em: https://ojs.wpro.who.int/ojs/index.php/wpsar/article/view/904. Acesso em: 3 jun. 2026.