Definition:
Roseola infantum is a benign disease affecting children, commonly under two years old, characterized by a temporary rash that occurs following a fever that lasts for three days.
Roseola infantum is more commonly known as exanthem subitum, which literally means “sudden rash”. Other names for the disease are sixth disease (because it is the sixth condition to cause rashes in children), baby measles (a more confusing name), and three day fever.
The origin of roseola infantum was unknown for a long time. Recently, however, research findings have revealed that the disease is caused by two human herpesviruses, namely HHV-7 (Roseolovirus) and HHV-6 (Human Herpesvirus Six).
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