Dr Mohan Kumar, right, checks on Sulman Khan, 8, as his mother, Naseeban Begam, centre, looks on at Sri Krishna Medical College Hospital in Muzaffarpur, India, Jun 24, 2013. A medical investigation into a sometimes deadly illness that for decades has been afflicting hundreds of children each summer in a region of India has solved the mystery. The culprit: lychee fruit eaten on an empty stomach by malnourished children. The New York Times

Questions linger about lychees in India

Researchers say the fruit was behind annual outbreaks of a fatal syndrome, but local doctors say that theory can’t explain all the cases