Measles is a very contagious virus that is spread through the air, usually through coughing and sneezing. The virus may remain in the environment for up to two hours after the infectious person has left the area. Exposure can occur even without direct contact with an infectious person. Early symptoms include a high fever, runny nose, cough and red eyes. A skin rash usually occurs three to five days later and begins and flat, red spots on the face.