Federal health officials say a dairy worker in Nevada has been infected with a new type of bird flu that’s different from the version that has been spreading in U.S. herds since last year.

This version of the virus is circulating broadly in wild birds and is different from the virus that has been causing dairy cow outbreaks since early 2024, the CDC said.

A strain of bird flu spreading among dairy cows in Nevada has infected a dairy worker in the state, the Centers for Disease Control and Prevention said Monday.