This patient support community is for questions related to juvenile diabetes including celiac disease, depression, diabetic complications, hyperglycemia / diabetic keto-acidosis, hypoglycemia, islet cell transplantation, nutritional issues, parenting a diabetic child, pregnancy, pump therapy, school issues, and teens with diabetes.
If she's receiving medical treatment, the prognosis is most likely very good. Once on an insulin drip, the body bounces back after a few days. The most taxing element to a new diagnosis is the changes in lifestyle, but if the parents are strong and can keep up with the constant diet restrictions, testing of blood sugar and injections, she should live a totally normal life with little in the way of complications.
good luck.