Smallpox eradication in West and Central Africa.
D000293:Adolescent; D000328:Adult; D000350:Africa, Central; D000354:Africa, Western; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D008875:Middle Aged; D012899:Smallpox / Q000517:prevention & control*; D014944:World Health Organization