This strain of bird flu, known as D1.1, has only ever previously been detected in wild birds and poultry, indicating that it has only recently spread to cows. The detection, found in dairy cattle ...

The different strain, D1.1, was recently found in cattle for the first time. Bird flu is continuing to spread across the U.S., and experts say they are "concerned" as public health officials ...

A new strain of bird flu, the D1.1 variant, has been detected in a dairy worker in Nevada, marking the first human case of H5N1 avian influenza in the state. While the infection generally leads to ...

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A dairy worker in Nevada has been infected with a strain of H5N1 bird flu—genotype D1.1—that has newly spilled over to cows, the Centers for Disease Control and Prevention has confirmed.