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b Swine flu b genes from pigs alone

There is some confusion about the number of cases in Mexico, as Mexican authorities have now started re-testing the bodies of people believed to have died of swine flu using a more accurate method. It is true that so far only seven ...

http://www.wired.co.uk/news/archive/2009-04/29/swine-flu-genes-from-pigs-alone?page=all