title: Imported wild poliovirus causing poliomyelitis, Bulgaria, 2001.
mesh_terms: D002031:Bulgaria / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks / Q000517:prevention & control*; D005260:Female; D006801:Humans; D017589:Immunization Programs; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D010243:Paralysis / Q000453:epidemiology / Q000209:etiology; D011051:Poliomyelitis / Q000150:complications / Q000453:epidemiology* / Q000517:prevention & control; D023321:Poliovirus Vaccines / Q000008:administration & dosage; D011159:Population Surveillance
chemical_list: D023321:Poliovirus Vaccines