Measles, is a viral infection of the respiratory system. Measles is a very contagious disease that can spread through contact with infected mucus and saliva. An infected person can release the infection into the air when they cough or sneeze.Symptoms include fever, dry cough, runny nose, sore throat, inflamed eyes (conjunctivitis) and tiny white spots with bluish-white centers on a red background found inside the mouth on the inner lining of the cheek.