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History
There have been several pandemic flu outbeaks in the last century.
The Spanish Influenza in 1918 killed an estimated 40-50 million people
The next pandemic in 1957; the Asian influenza caused around 2 million deaths
The most recent pandemic in 1968, the Hong Kong influenza killed approximately 1 million people
Between 1997 and 2006 several new strains have appeared: H5N1, H9N2, H7N2, H7N3 and H10N7, all of which have pandemic potential.
The H5N1 strain has so far caused the most human cases and bears the highest resemblance to the deadly 1918 strain. The current threat is now a grave concern to governments around the world.
How swine 'flu has spread
Pandemic 'flu alert chart
Articles
Swine Flu Outbreak Sparks Mutation Fears
British scientists are examining samples of a strain of swine flu behind a deadly Ukrainian outbreak to determine whether the virus has mutated..More
Swine flu hits 150 at school
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Swine flu doctors 'unnerved' by patients' decline
Doctors have been "unnerved" by the severity of swine flu in some patients and their rapid deterioration into a "life and death situation", Sir Liam Donaldson, chief medical officer has said..More
