Eradicating polio.
Jones
J S
JS
D000349:Africa; D002648:Child; D002675:Child, Preschool; D006801:Humans; D017589:Immunization Programs; D007223:Infant; D007231:Infant, Newborn; D011051:Poliomyelitis / Q000517:prevention & control*; D014944:World Health Organization