What is H5N9 and how is it different from H5N1? Scientists classify bird flu viruses by which kind of two key proteins are ...

The number of bird flu cases in Central Massachusetts is relatively low, compared to a swath of the state that runs from ...

The first outbreak of H5N9 bird flu in poultry has been reported in California on a duck farm leading to the culling of ...

Global outbreak of Avian Influenza H5N1 in birds, spreading to cattle and humans, raising concerns for potential evolution ...

First U.S. detection of virulent H5N9 strain, at a California duck farm, draws scrutiny as evidence of genetic reassortment ...

The United States has reported its first H5N9 bird flu outbreak in California, affecting almost 119,000 ducks. Both H5N9 and ...

State officials are warning the public to avoid handling birds and other wildlife as suspected avian flu cases are now ...

The first human death caused by H5N1 in the U.S. was reported in Louisiana on Jan. 6. Here's what to know about bird flu.

A decade-old bird flu strain, H5N9, has surfaced in US poultry for the first time, detected in a California duck farm.

H5N1 avian influenza continues to spread amid commercial and backyard poultry, and additional cases have been reported in domestic cats ...

A new strain of bird flu, H5N9, has been detected for the first time in the United States, raising concerns about h ...