Parasitology
10 facts on guinea-worm disease
A painful and debilitating blight - guinea-worm disease, or dracunculiasis - has been nearly eliminated due to a highly focused international public health initiative that uses inexpensive, practical interventions in target areas. Today, the disease has been eradicated in most countries, though some strongholds remain in five endemic African countries.
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http://www.who.int/features/factfiles/guinea_worm/en/index.h...
World Health Organization