This document discusses measles, a highly contagious viral disease caused by the paramyxovirus. It defines three classifications of measles based on severity and presence of complications. The disease is transmitted through respiratory secretions, blood, and urine via direct contact with infected individuals. Clinical features include cough, runny nose, conjunctivitis, fever, Koplik spots, and rash. Complications can include otitis media, pneumonia, bronchitis, and convulsions. Nursing considerations for treatment involve isolation, rest, supportive care including vitamin A, and skin and eye care. Prevention focuses on controlling infection sources, interrupting transmission, protecting susceptibles through active/passive immunization, and routine measles vaccination