Just a few years ago, it was rare to hear about a child with type 2 diabetes. It used to be thought that if diabetes occurred in childhood, it was type 1, or juvenile-onset, diabetes. Not anymore. Now, according to the CDC, more than 186,000 people younger than age 20 have diabetes -- both type 1 and type 2 diabetes, formerly called adult-onset diabetes. How can you prevent this threat to your child's health? What can you do if your child is diagnosed with type 2 diabetes?