Yes, influenza (Italian for "the influence) is caused by a virus . . . actually a number of different viruses.
The influenza virus.
the influenza virus is just another name for the flu......you know runny nose, high fever, and such.
Measles is caused by virus.
Rabies is caused by RNA virus.
virus
It is a virus.
virus is a disease which is caused by virus
It is caused by a virus called A-H1N1/09 influenza virus (aka swine flu).
It is caused by a virus infection
The autoimmune disease caused by the HIV virus is AIDS.
Bacteria Virus
A virus