Expanded programme on immunization. Changes in the poliomyelitis immunization programme.
D000293:Adolescent; D000328:Adult; D000917:Antibody Formation; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007114:Immunization / Q000592:standards*; D007223:Infant; D008875:Middle Aged; D011044:Poland / Q000453:epidemiology; D011051:Poliomyelitis / Q000453:epidemiology / Q000276:immunology* / Q000517:prevention & control; D016036:Seroepidemiologic Studies