you might want to think again, bacause; ‘Swine Flu Might Have Evolved at U.S. Farms’

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A picture is now emerging of how U.S. and Mexican officials, with a key assist from a Canadian government lab, first realized they faced a new type of disease and began racing to isolate its earliest origins. Until recently, Mexico was widely assumed to be ground zero. Now, however, some California doctors are questioning that.

The four earliest confirmed cases are divided evenly between California and Mexico. In fact, it appears two children in California got sick in late March, several days before the first two known Mexico cases in early April.

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In an interview with Science Magazine, the CDC's chief virologist, Ruben Donis' essentially confirmed the reading of the current swine flu strain made by New Scientist: that it evolved from a strain that cropped up in U.S. hog farms in 1998.

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“We haven’t found evidence of infected pigs,” said Ian Lipkin, a Columbia University epidemiologist and member of the World Health Organization’s surveillance network. “But even if we never find that smoking pig, we can surmise that this is probably where it came from.”

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