Final answer:
Measles is a viral infection that primarily affects the respiratory system. It is highly contagious and causes symptoms like high fever, conjunctivitis, sore throat, and a characteristic rash.
Step-by-step explanation:
The accurate statement that describes the measles virus is c) Measles is a viral infection that primarily affects the respiratory system. The measles virus is a highly contagious, single-stranded, negative-strand RNA virus that spreads through direct contact with infectious secretions or inhalation of airborne droplets. It causes symptoms such as high fever, conjunctivitis, sore throat, and a characteristic rash that starts on the face and spreads to the extremities. Measles can also cause extremely high fevers and Koplik's spots, white spots on the inner lining of the cheeks.