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Roseola (roseola infantum) is a mild illness caused by a virus. It is generally harmless and is most common in children 6 months to 2 years of age. It is rare after age 4. Roseola is caused by two common viruses.
Children can only spread the infection before they have the symptoms of the illness-ie. fever and/or rash. Once they have symptoms, they are no longer contagious. There is no known way to prevent the spread of Roseola. There is no vaccine. Good and regular hand-washing and drying is the best way to help reduce the spread of the virus. Sharing eating utensils should also be avoided.