Poliovaccine at school entry.
D000906:Antibodies / Q000032:analysis; D002648:Child; D006801:Humans; D007115:Immunization Schedule; D011051:Poliomyelitis / Q000276:immunology / Q000517:prevention & control*; D011054:Poliovirus Vaccine, Inactivated; D014611:Vaccination
D000906:Antibodies; D011054:Poliovirus Vaccine, Inactivated