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Influenza Influenza is a viral infection.It is an infection of the air passages (respiratory tract). It causes:Fever, Head ache, Muscle ache, Weakness, Chills, Loss of appitite, Fatigue. Influenza is formally known as 'flu'. Flu is spread by virus infected droplets coughed or sneezed into the air by a person who is carrying the virus around.It usually occurs in small outbrakes or very rarely in epidemics.Outbrakes tend to occur in winter;it spreads rapidly especially in schools and old peoples' homes. Causes There are three types of influenza virus's called, A, B and C. A person who has been attacked by virus C needs antibodies (proteins made by the immune system).They should provide immunity against the virus for life.Type C only causes a mild illness that is not much different from a cold, none of the symptons aply to type C except weakness. If you have been suffering from type B you would have...

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