In the new study, the researchers collected samples containing virus from 26 dairy farms in eight states. Cows are not typically susceptible to this type of influenza, but H5N1 appears to have acquired mutations in late 2023 that allowed it to jump from wild birds to cattle in the Texas Panhandle, the researchers said.

Dairy cattle infected by avian influenza in recent months have surprisingly large amounts of the virus in their milk but little in other bodily fluids, according to tests by the Iowa State University Veterinary Diagnostic Laboratory.

The discovery of fragments of avian flu virus in milk sold in U.S. stores, including in about 20% of samples in initial testing across the

The Texas dairy worker infected by H5N1 "did not disclose the name of their workplace," frustrating investigators.

B ird flu could mutate and spread among other animals and humans, the Centers for Disease Control and Prevention's top flu scientist said. Dr Vivien Dugan, acting Director of CDC'