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Are Pig Farms Flu Factories?
The outbreak of bird flu (H5N1) five years ago and last year's swine flu (H1N1) pandemic resulted from viruses jumping from animals into humans, which led to some calls for increased monitoring of birds and pigs on farms. But Helen Branswell says in an article in this month's Scientific American that pig farms in America basically act like "flu factories." (Branswell's piece is behind a pay-wall ...