influenza; flu; an acute respiratory infection caused by a virus

respiratory infection caused by parainfluenza viruses, typically involving the upper respiratory tract

Japanese B encephalitis, a viral infection of the brain transmitted by mosquitoes

Acute infectious disease caused by meningococcal bacteria entering the brain via the respiratory tract; symptoms include high fever, severe headache, vomiting, stiff neck, and convulsions.

mumps; epidemic parotitis, an acute viral infection characterized by swelling of the parotid glands, fever, and pain; most common in children and usually results in lifelong immunity