Measles, also called Rubeola, is a respiratory disease caused by a virus. The virus normally grows in the cells that line the back of the throat and in the cells that line the lungs. Symptoms include a rash, high fever, cough, runny nose, and red, watery eyes. Measles is especially prevalent where malnutrition and vitamin A deficiency are common. Measles is the leading cause of blindness among African children and kills almost 1 million children in the world each year.
Source: US Center for Disease Control