Susceptibility to infection after vaccination.
D002675:Child, Preschool; D006801:Humans; D008581:Meningitis / Q000150:complications; D011014:Pneumonia / Q000150:complications; D011054:Poliovirus Vaccine, Inactivated; D014611:Vaccination / Q000009:adverse effects*
D011054:Poliovirus Vaccine, Inactivated