Influenza, or as it is commonly known, the flu, is
a contagious respiratory disease caused by a virus.
The influenza virus can cause mild to severe illness, and while most people
recover without complications in 1-2 weeks, the disease at times can lead to death.
The best approach to influenza is through prevention but once the infection
takes place and the symptoms appear (high fever, headache, extreme tiredness etc)
the disease needs to be treated.
Today serious concern is caused by two particular forms of influenza called
Avian influenza (bird flu). and Swine influenza (swine flu).
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