A major cholera pandemic has spread in at least three waves from a single global source: the Bay of Bengal.A study in Nature reveals cholera's spread over the last 60 years into Asia, Africa, Europe and the Americas, continent-hopping on long-haul flights. The research by a team from Cambridge's Sanger Institute showed the infection is evolving, with the newest waves showing antibiotic resistance. A UK expert said it was "a scandal" cholera was still affecting people. Cholera is a bacterial infection of the intestine that causes diarrhoea. It affects 3-5m people annually in 56 countries, killing between100,000 and 150,000. If...