Measles is an acute viral respiratory illness. It is characterized by a prodrome of fever (as high as 105°F) and malaise, cough, coryza, and conjunctivitis - the three “C”s -, a pathognomonic enanthema (Koplik spots) followed by a rash. The rash usually appears about 14 days after a person is exposed. The rash spreads from the head to the lower extremities. Patients are considered to be contagious from 4 days before to 4 days after the rash appears.