New Scientist has a number of articles about flu and swine flu in its current edition. One of those articles, by Debora MacKenzie, says that "this type" of swine flu (presumably H1N1) has been known to be circulating in pigs in the United States since 1998 and has been evolving rapidly in that population.
I have also read that the disease in affecting younger people rather than older ones, suggesting that there were in previous decades flu epidemic of a strain of flu, and that the antibodies left to the people infected by that virus provide some protection to the current virus,
Wednesday, April 29, 2009
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