Writer Helen Branswell says in an article in Scientific American that American pig farms are virtual "flu factories" because monitoring of animal health is so weak.
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Read the complete post at http://www.npr.org/blogs/health/2010/12/23/132256243/scientific-american-u-s-pig-farms-may-be-flu-factories?ft=1&f=103537970
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Dec 23 2010, 05:37 AM
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