Bangkok Post - Farm animals are hauled all over the country; so are their pathogens

The bird flu virus that is spreading through American dairy cows can probably be traced back to a single spillover event. Late last year, scientists believe, the virus jumped from wild birds into cattle in the Texas panhandle. By this spring, the virus, known as H5N1, had travelled hundreds of miles or more, appearing on farms in Idaho, North Carolina and Michigan.

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