Measles, also known as rubeola, is a medical condition that is characterized by the presentation of flu-like symptoms, red eyes and patches of reddened rashes. Accompanying symptoms include transient spots that appear in the mouth, which are unique to measles. The condition is more common among below 2 years of age and is highly contagious, but has become relatively rare following widespread vaccination programs throughout the world. The prognosis is generally good with a good survival rate, but complications are relatively common, ranging from the relatively mild (such as diarrhea) to the very serious (such as acute encephalitis); complications are generally more severe in adults, the malnourished and the immunodeficient. Since it is very infectious, individuals with this condition should immediately consult a medical professional.