President Jimmy Carter, 100 years old, has hoped to outlive Guinea worm
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Nearly a decade ago, former U.S. president Jimmy Carter said he hoped to outlive a parasitic worm that has inflicted pain on millions of people. The Guinea worm has resisted.

From the Atlanta Journal Constitution News:

Jimmy Carter consoles a young patient having a Guinea worm removed from her body in Savelugu, Ghana, in February 2007. The Carter Center led the international campaign to try to eradicate Guinea worm disease. (Louise Gubb/The Carter Center/TNS)