Measles (rubeola) is a dangerous disease that is sometimes known as "hard," "red," or "seven-day measles." Individuals with measles commonly get ear infections and/or pneumonia. German measles (rubella) is a three-day illness with little consequences in children. Adults who were exposed to the virus may have an immune system that is weakened, which can lead to serious medical conditions such as brain damage or miscarriage. German measles is usually not contagious until four days after you first show symptoms because your body produces more antibodies during its immune response to the virus. However, someone who shares a room with you or eats with you could be infected with German measles if they have not been vaccinated yet. Measles is highly contagious and was once found in almost every American child by the time they reached school age. Because of this, many schools require students to prove their immunity to measles before allowing them to return to class. People who have not been immunized against measles are likely to get sick if they come into contact with an individual who has the virus. If you are unsure whether or not you have been vaccinated, talk to your doctor. They will be able to tell you whether or not you need to get further immunized.