The death of at least 13 children due to an as-yet unidentified illness over the last fortnight has flummoxed the medical community in Gurgaon. The children, all between two months and four years, were brought to Kalawati Saran hospital in New Delhi from Gurgaon and its adjoining areas after being afflicted by loose motions, fever and vomiting. Subsequently, they stopped passing urine and died due to renal failure even after dialysis.