Poliomyelitis immunization.
D002675:Child, Preschool; D006801:Humans; D007115:Immunization Schedule; D007223:Infant; D011051:Poliomyelitis / Q000517:prevention & control*; D011054:Poliovirus Vaccine, Inactivated; D011055:Poliovirus Vaccine, Oral; D014611:Vaccination
D011054:Poliovirus Vaccine, Inactivated; D011055:Poliovirus Vaccine, Oral