Roseola in the Child Care Setting Roseola (exanthem subitum) is caused by a virus called human herpesvirus 6 (HHV-6) and, possibly, human herpesvirus 7 (HHV-7). It is most common in children 6 months to 24 months of age. Symptoms include a high fever that lasts for 3 to 5 days, runny nose, irritability, eyelid swelling, and tiredness. When the fever disappears, a rash appears, mainly on the face and body, and lasts for about 24 to 48 hours. However, other complications of roseola are rare.
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Three Day Fever The disease also has other names; Roseola infantum, exanthematous fever, and three-day-rash. Although most small children catch it, it is one of the lesser-known children's diseases that causes a rash. It is only seen in children from the age of six months to three years and it is highly contagious.
What is Roseola Virus? Roseola is an infectious virus that many infants under three years old can catch, but is most common in infants under age one. Roseola is thought to be caused by the human herpes virus six.