As world leaders gathered today to co-ordinate more than €2.8bn in tsunami relief, doctors warned of a looming catastrophe from ever-more serious health crises – gangrenous wounds that require limb amputations, scores of children with diarrhoea, pneumonia caused by exposure to dirty water.

Even as world leaders gathered today to co-ordinate billions of dollars in aid, doctors warned of a looming catastrophe from ever-more serious health woes - gangrenous wounds that require limb amputations, scores of children with diarrhea, pneumonia caused by exposure to dirty water.