Progress towards poliomyelitis eradication: Afghanistan and Pakistan--January 2000 to April 2002.
D000293:Adolescent; D000346:Afghanistan / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D006801:Humans; D017589:Immunization Programs; D015994:Incidence; D007223:Infant; D010154:Pakistan / Q000453:epidemiology; D011051:Poliomyelitis / Q000453:epidemiology / Q000517:prevention & control*; D011159:Population Surveillance