"It is contagious from about two days before the fever starts until 1 or 2 days after the fever is gone, even if the rash continues. Children who are fever-free for 1 or 2 days can return to school, even if they still have rash. It is passed via saliva, runny nose, or cough. The incubation period (time from when your child is exposed to the time of actual illness) is around 10 days." "You essentially just treat any symptoms that are bothering your child. There is no actual treatment for this virus. The main thing to keep in mind is that this virus can cause high fevers. Try to be diligent in treating moderate to high fevers." Source: http://www.askdrsears.com/topics/health-concerns/childhood-illnesses/roseola