Sign in  |  Register

Illustrated Health Encyclopedia
Powered by Adam.com | Important notice

Ency. home > Disease > I > Influenza > Image index > Image

Influenza

Influenza

Influenza is a viral infection of the respiratory tract that causes coughing, breathing difficulty, fever, headache, muscle aches and weakness. The virus is spread from person to person by inhaling infected droplets from the air.

Ency. home > Disease > I > Influenza > Image index > Image

Please read this Important notice. Adam Images and Content under license from adam.com, Inc., © 2002 adam.com, Inc.