Routine immunization with orally administered attenuated poliovirus. A study of 850 children in an American city.
D002648:Child; D005006:Ethnicity; D006801:Humans; D011051:Poliomyelitis / Q000276:immunology*; D017955:Poliovirus; D014481:United States; D014611:Vaccination
POLIOMYELITIS/immunology