title: Poliomyelitis--a persistent problem.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D003237:Connecticut; D005260:Female; D006801:Humans; D008297:Male; D011051:Poliomyelitis / Q000453:epidemiology / Q000276:immunology / Q000517:prevention & control*; D011054:Poliovirus Vaccine, Inactivated; D014611:Vaccination
chemical_list: D011054:Poliovirus Vaccine, Inactivated