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Cholera, though easily preventable, is one of the most deadly diarrhoeal diseases. Once someone is infected through contaminated food or water, the vibrio cholerae bacteria are present in faeces for one to two weeks, and without proper sanitation are likely to infect others. But proper sanitation facilities, as well as safe drinking water, are out of reach for most Chadians. And tackling this, experts say, must be the priority post-emergency. With the rate of infection slowing as of mid-December, Chad had 6,369 documented cases of cholera with 180 deaths, according to the UN Office for the Coordination of Humanitarian Affairs.