More than 500 people have died so far in a cholera epidemic that is sweeping the Democratic Republic of Congo, the World Health Organization (WHO) said. Outbreaks of the water-borne disease occur regularly in Congo, mainly due to poor sanitation and a lack of access to clean drinking water. But this year’s epidemic, which has already hit at least 10 urban areas including the capital Kinshasa, is particularly worrying as it comes as about 1.4 million people have been displaced by violence in the central Kasai region.