Rubella is a contagious disease caused by a virus. Most people who get rubella usually have a mild illness, with symptoms that can include a low-grade fever, sore throat, and a rash that starts on the face and spreads to the rest of the body. Rubella can cause a miscarriage or serious birth defects in a developing baby if a woman is infected while she is pregnant. The best protection against rubella is MMR (measles-mumps-rubella) vaccine.
Rubella is also called “German measles,” but it is caused by a different virus than measles. Rubella was eliminated from the United States in 2004. Rubella elimination is defined as the absence of continuous disease transmission for 12 months or more in a specific geographic area. Rubella is no longer endemic (constantly present) in the United States. However, rubella remains a problem in other parts of the world. It can still be brought into the U.S. by people who get infected in other countries.
To learn more: About Rubella | CDC