Definition of Influenza or ‘Flu’

Influenza comes on quickly and symptoms tend to be more severe than those of the common cold. Typical symptoms include fever, muscle aches, headache, tiredness, dry cough, sore throat and a blocked or runny nose. Sometimes the gastrointestinal tract is involved with symptoms of nausea, vomiting and diarrhoea. Complications of influenza can be severe and the condition may be fatal. According to the World Health Organization statistics, it is estimated that every year over a billion people develope flu, over 3 million people develope severe disease, and up to 500 thousand people die of it.2