A common virus may be the trigger for the development of many cases of diabetes, particularly in children. Signs of enteroviruses were found in pancreatic tissue from 60% of children with type 1 diabetes, but in hardly any children without the disease. The study also found that 40% of adults with type 2 diabetes had signs of the infection in insulin-producing cells. Diabetologia. 2009;52:1143-51. doi:10.1007/s00125-009-1276-0