'Flu' is commonly known as influenza. It is an infectious disease caused by virus Fever, runny nose, sore throat, headache, coughing and sneezing are the main symptoms of flu. If we get the flu, we should cover our mouth and nose with tissue or handkerchief when we cough or sneeze. We should stay at home to take rest. We should try to eat even if we aren’t hungry. We should drink a lot of water and juice. We should follow the doctor’s advice.