The only way to stop the disease from spreading is through education. As a parent you can't control your teens' and children behavior. The way to protect them is to educate them. They may be afraid or confused or have misinformation and wrong ideas. You can set them straight and reassure them while you share your view and values.
Most parents have a hard time talking with their children about sex, death and drugs.
No matter how uncomfortable you feel, don't use nervousness as an excuse for not talking with your children about this disease. Don't wait for your teens and children to begin. Provide information and discuss it at a level that's understandable, depending on the child's age. Be aware of some kids' worries, such as that they may catch it and die. Reassure them that while HIV is dangerous, they can avoid it and stay safe.