Measles is a highly contagious respiratory disease caused by a virus. It spreads through the air through coughing and sneezing. Measles starts with a fever, runny nose, cough, red eyes, and sore throat, and is followed by a rash that spreads all over the body. About three out of ten people who get measles will develop one or more complications, including; pneumonia, ear infections, or diarrhea.
From January 1 to January 30, 2015, 102 people from 14 states were reported to have measles. Most of the cases are part of a large, ongoing, multi-state outbreak linked to an amusement park in California.