Emergence of vaccine-derived poliovirus type 2 after using monovalent type 2 oral poliovirus vaccine in an outbreak response, Philippines. - Alipon SB; Takashima Y; Avagyan T; Grabovac V; Aslam SK; Bayutas B; Logronio J; Wang X; Shrestha A; Neupane S; Roces MC; Apostol LN; et al. (Western Pacific surveillance and response journal : WPSAR, 2022)