How did H5N1 bird flu get introduced to California's dairy industry?
Briefly

The H5N1 bird flu that ravaged dairy herds in 13 states was inevitably going to arrive in California due to interstate cattle movement, experts say.
Anja Raudabaugh confirmed that a Tulare County dairy farmer sold cows to Idaho, which had reported infected herds, leading to possible spread of the virus.
Steve Lyle, a spokesman for California's Department of Food and Agriculture, stated that the genetic sequencing of the virus in California is most similar to that found in Idaho.
Sydney Kennedy of Idaho's Department of Agriculture acknowledged a shipment from California to Idaho was received but not accepted and warned about adhering to movement restrictions.
Read at Los Angeles Times
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