Rubella (also known as German measles) is a disease caused by the Rubella virus.
It is often mild and an attack can pass unnoticed. However, this can make the virus very difficult to diagnose.
The disease can last 1–5 days. Children recover more quickly than adults.
The virus usually enters the body through the nose or throat. Like most viruses living along the respiratory tract, it is passed from person to person by tiny droplets in the air that are breathed out.