Переделать предложения в пасивный залог influenza is a very infectious disease. the disease can be mild or severe. the symptoms of influenza are: high temperature, headache, general pains. in most eases the patient must stay in bed, be warm and 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 through 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.