There are two types of diabetes, Type I and Type II. The treatment for Type I diabetes is different from the treatment for Type II
diabetes, so it is important for a correct diagnosis to be made.
Diagnosis can be difficult, particularly in people aged between 20 and 40 years old.
A genetic screening method is now available for the diagnosis of diabetes.
Explain why doctors are more likely to screen individuals once they develop
diabetes than use methods such as prenatal testing.