A new variant of the bird flu has infected a dairy worker in Nevada marking the state's first human case of the H5N1 avian influenza.

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.

A new strain of bird flu has infected a dairy worker in Nevada, marking the first cow-spread case, the CDC has reported. Jacob Glanville of Centivax addressed the public risk.