By Emily Anthes and Apoorva Mandavilli Dairy cows in Nevada have been infected with a new form of bird flu that is distinct from the version that has been spreading through herds over the last ...

Dairy cows in Nevada have been infected with a new form of bird flu that is distinct from the version that has been spreading through herds over the past year, the U.S. Department of Agriculture ...

Symptoms seen in humans infected by D1.1 have been more severe than the previous bird flu strain that has been spreading in cows. That strain, called B3.13, has led to only mild symptoms ...