A dairy worker in Nevada has been confirmed to be infected by a new bird flu strain found to be spreading among cows in the state last week. That strain of the H5N1 bird flu virus, called D1.1 by ...

The transmission route of the D1.1 variant to the Nevada cows is unknown, although farmers with infected herds reported ...

The strain has been detected in dairy herds from Nevada and Arizona ... Children’s Research Hospital in Memphis, Tenn. The D1.1 strain is widespread in the U.S. and Canada, but until this ...