title: Environmental isolation of circulating vaccine-derived poliovirus after interruption of wild poliovirus transmission, Nigeria, 2016.
mesh_terms: D060740:Disease Eradication; D006297:Health Services Accessibility; D006801:Humans; D017589:Immunization Programs / Q000458:organization & administration; D009549:Nigeria; D011051:Poliomyelitis / Q000517:prevention & control / Q000635:transmission / Q000821:virology*; D017955:Poliovirus / Q000302:isolation & purification*; D011055:Poliovirus Vaccine, Oral; D012722:Sewage / Q000821:virology; D014613:Vaccines, Attenuated
chemical_list: D011055:Poliovirus Vaccine, Oral; D012722:Sewage; D014613:Vaccines, Attenuated