Measles, also known as morbilli, rubeola, or red measles, is a highly contagious infection caused by the measles virus. Initial signs and symptoms typically include fever, often greater than , cough, runny nose, and red eyes. Two or three days after the start of symptoms, small white spots may form inside the mouth, known as Koplik's spots. A red, flat rash which usually starts on the face and then spreads to the rest of the body typically begins three to five days after the start of symptoms. Symptoms usually develop 10–12 days after exposure to an infected person and last 7–10 days. Complications occur in about 30 nd may include diarrhea, blindness, inflammation of the brain, and pneumonia among others. Rubella (German measles) and roseola are different diseases.