More than 1,070 dairy herds across 17 states have tested positive for H5N1 avian influenza, and California, home to the ...

Scientists have now traced why the H5N1 bird flu virus that jumped into U.S. dairy herds keeps turning up in cows’ udders and ...

Over 100 dairy cattle herds in around a dozen states have reported cases of the highly infectious disease since March. The U.S. Department of Agriculture has announced the results of a study showing ...

Lessons from Dr. Maxwell Beal, the veterinarian who diagnosed the first case of HPAI in cattle in California in 2024.

When H5N1 bird flu first began infecting U.S. cattle in early 2024, diagnosis was elusive because, in cows, the disease ...

Study finds even trace exposure to H5N1 virus can trigger infection as spread between dairy herds remains unclear ...

A bird flu outbreak in U.S. dairy cows has grown to affect more than two dozen herds in eight states, just weeks after the nation's largest egg producer found the virus in its chickens. Health ...

A new study from Ohio State University has found that just ten particles of H5N1 bird flu are enough to infect a cow, ...

Avian influenza has raged through Michigan's bird population for two years, forcing commercial farmers and people with backyard coops to kill more than 6.6 million infected chickens and turkeys in ...

The outbreak isn’t widespread, so the risk to humans is low. But it does have the potential to cause severe illness.

The deadly H5N1 strain of bird flu has been found in seabirds in two Australian states. But don't be fooled by the name: This ...

The H5N1 virus can be fatal to cats and dogs but cases are infrequent and may be mistaken for other illnesses ...