Paralytic poliomyelitis in immunized and unimmunized children.
D002648:Child; D002675:Child, Preschool; D006801:Humans; D011051:Poliomyelitis / Q000209:etiology*; D011054:Poliovirus Vaccine, Inactivated / Q000008:administration & dosage*; D014611:Vaccination
D011054:Poliovirus Vaccine, Inactivated