Short description
Influenza is a disease of the airways that is caused by the influenza virus.

Detailed description

There are three types of influenza viruses: A, B and C. As they frequently mutate, the influenza vaccine needs to be adapted regularly. Symptoms of an influenza infection are a sudden feeling of illness, fever, coughing and limb pain; severe disease progression is possible. It is necessary to differentiate the flu from a common cold, which refers to other, mostly harmless viral infections.