The main symptoms are a high temperature(38-40C) that comes on quickly a dry cough sweating and general muscle aches and pains.
Your symptoms will usually peak after 2-3 days and you should begin to feel much better within 5-8 days, although a cough and general tiredness may last for 2-3 weeks.
Flu usually occurs during the winter months, from October to April in the UK. This can result in serious illness and can be life threatening.
The number of people who consult their GP with flu-like illness during the winter varies from year to year. However, healthy people with flu do not need to consult their GP.