Watch Mayo Clinic hematology experts discuss the latest in diagnosis and treatment on YouTube. Mayo Clinic is one of the leading medical facilities in the country for the diagnosis and management of various blood disorders. Hematology specialists at Mayo Clinic are internationally recognized as leaders in the field of blood disorders. Experts in hematology at Mayo Clinic are at the leading edge of research to continuously improve diagnosis and treatment options.
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.
Other Infections with Rashes. Rubeola (measles) is often confused with roseola and rubella (German measles), but these three conditions are different. Measles produces a splotchy reddish rash that spreads from head to foot. Roseola is a condition that affects infants and toddlers.ther Infections with Rashes. Rubeola (measles) is often confused with roseola and rubella (German measles), but these three conditions are different. Measles produces a splotchy reddish rash that spreads from head to foot. Roseola is a condition that affects infants and toddlers.