BBC. The Ukrainian port city of Mariupol, all but destroyed by weeks of shelling and now under Russian control, is at risk of a major cholera outbreak, the UK defence ministry says.
Much of the city's infrastructure is damaged or destroyed and water has mixed with sewage, according to the UN.
Cholera is usually caught by eating or drinking contaminated food or water and is closely linked to poor sanitation.
Uncollected dead bodies and rubbish add to the unsanitary conditions.
There have been outbreaks of the disease in Mariupol before, and isolated cases have been reported in the past month.