Expanded programme on immunization (EPI). Poliomyelitis surveillance.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D015023:Democratic Republic of the Congo / Q000453:epidemiology; D006801:Humans; D007114:Immunization; D015994:Incidence; D007223:Infant; D011051:Poliomyelitis / Q000453:epidemiology* / Q000517:prevention & control