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Published online 28 July 2005 | Nature | doi:10.1038/news050725-9
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Flu viruses mix it up
Study of gene swapping adds to pandemic fears.
A map of the evolution of flu viruses has revealed just how frequently they swap genes with each other.
The result renews fears that a nasty virus such as avian influenza could pick up a gene from a human flu virus that makes it more transmissible, leading to a possible pandemic.
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