Notes from the Field: Circulating Vaccine-Derived Poliovirus Type 1 and Outbreak Response - Papua New Guinea, 2018. - Bauri M; Wilkinson AL; Ropa B; Feldon K; Snider CJ; Anand A; Tallis G; Boualam L; Grabovac V; Avagyan T; Reza MS; Mekonnen D; et al. (MMWR. Morbidity and mortality weekly report, 2019)