Nevada confirms first human case of new bird flu strain from infected dairy herd

A Nevada dairy worker is believed to be the first human infected with a recent strain of bird flu from a cow. - ((David Cheskin/PA file))

A Nevada dairy worker has become the first human known to be infected with a new version of bird flu from a dairy herd.

The flu strain (D1.1), which has been circulating in wild birds, is different from the version that has been spreading in American dairy herds since last year, federal health officials said Monday. It’s also different from the strain of the virus (B3.13) that has caused the majority of human infections in the U.S.