Rubella, also called German measles or 3-day measles, is a contagious infection caused by a virus. It is spread through secretions when a person coughs, sneezes, and has close contact with others.
Rubella usually is mild and does not cause long-term problems. But if you are pregnant and get it, you can pass the infection to your baby (fetus), which can cause serious birth defects.
When you have rubella, you may get a rash and a mild fever, and the lymph glands in your neck may swell. Older children often have a fever, eye pain, a sore throat, and body aches. You can treat most symptoms with care at home.
Avoid being around others, especially people who are pregnant, until your rash has been gone for at least 4 days. People who have not had this disease before or have not had the vaccine have the highest risk of getting the virus.