It's war on tropical diseases
But experts warn that drugs alone will not win it, after the pharmaceutical giants agree to work together on an ambitious project.
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Stamping out Guinea worm 'dragons' in Sudan
Scars on Severion Wayet's arms reveal where the flesh-burrowing Guinea worms burst through her skin.
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Fighting the 'fiery serpent' in Sudan
Rheumy-eyed Chief Joseph Lokoi has lived through two civil wars in south Sudan, but the scars covering his body are not the relics of battle.
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