Influenza is a very infectious disease. The disease can be mild or severe.
The symptoms of influenza are: high temperature, head-ache, general pains.
In most cases the patient must stay in bed, be warm, drink much water. The patient must stay in bed until the temperature is normal and for the next two or three days he may be up for only short periods. After influenza patients feel weak and often depressed.
As influenza is very infectious you must remember:
Never shake hands when you have a cold. Colds pass trough the hands. But don't say: "I cannot shake hands. I have a cold." Let it be as if you forgot to shake hands. But you must be very polite in speech.