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Available for over a year

Only 22 cases were reported in 2015, a significant drop from the 126 cases in 2014. Dr Donald Hopkins, Special advisor for Guinea Worm Eradication at the The Carter Center - the organisation leading the fight against the disease - is hopeful that the disease could disappear next year. (Picture: Sadia Mesuna and her friend Fatawu Yakubu look at a picture book about Guinea worm disease in Ghana in 2007; Credit: The Carter Center)