Rubella is commonly known as the German Measles. It symptoms include fever, headache, runny nose, rash, and muscle/joint pain. It's very dangerous to pregnant women because it can pass to their unborn baby causing miscarriage, stillbirth and birth defects. While there is no cure for Rubella, one can prevent it by getting an MMR (measles-mumps-rubella) vaccine. If you do get it symptoms like fever can be treated with acetaminophen.