The Biden administration will require dairy cows moving across state lines to be tested for bird flu, part of a growing effort to stamp out the virus spread that poses little risk to people.
Federal health officials reassure Americans the bird flu threat to the public remains low, despite a growing number of infected mammals; testing aims to protect livestock industry and understand the disease better.
Federal regulators found inactive viral fragments in pasteurized milk, indicating wider spread among cattle; no genetic changes to allow easy human spread.
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