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Sheep eat grain in a barn in central Iowa in the spring of 2024. One looks up at the camera.
Rachel Cramer
/
Iowa Public Radio
When bird flu spilled over into dairy cattle last year, researchers discovered high concentrations of the H5N1 virus in the raw milk and udders of infected cows. A new study shows the mammary glands of other livestock and humans could also be suitable hosts for the virus.

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