‘Flu (Influenza) is an acute illness caused by the group of influenza viruses. It can affect people of all ages, but is most serious in the elderly. It is usually of fairly sudden onset with fever, chills, headache, aching muscles and joints, cough and often sore throat. These symptoms are usually much worse than in a cold and usually tend to resolve in about a week. In people with pre-existing lung disease it can last longer and the symptoms are more severe. Vaccination in the autumn has a useful protective effect. Antibiotics are of no use because they do not work against viruses. There are specific drugs which are used in certain situations. Most people need rest with plenty of fluid and Paracetamol.