Marwa Khaled’s teenage son was hospitalised with cholera after drinking polluted water in Lebanon’s impoverished north — yet she still buys the same contaminated water, the only kind she can afford. “People know (the water is contaminated), but they don’t have any other choice,” said 35-year-old Khaled, standing near her son, who is bedridden at a cholera field hospital. “Everyone will end up with cholera.” Last month Lebanon recorded its first cholera case since 1993, in the nearby Syrian refugee camp of Rihaniye – weeks after an outbreak in Syria, which lies about 20 kilometres (12 miles) a…