Concerns about bird flu — officially known as avian influenza A (H5) — continue to mount, particularly in California.

Cows in California are dying at much higher rates from bird flu than in other affected states, industry and veterinary ...

The Centers for Disease Control and Prevention has confirmed a third human case of bird flu was found in California.

The state now has 11 cases of people catching the virus, as health officials monitor any further spread from poultry and ...

Another five suspected cases of bird flu were reported today in California, where six cases have already been confirmed, ...

A fourth person contracted bird flu in California amid outbreaks in the state’s dairy industry, state officials said Thursday ...

H5N1 avian influenza, more commonly known as bird flu, has been confirmed in more than 100 dairies in Central California.

A third farmworker has tested positive for bird flu in California, according to the state’s health department. If confirmed ...

Five more people who presumably contracted the bird flu are being tested in California's Central Valley and are pending CDC ...

Federal and state health officials said they have confirmed a third human case of bird flu in California and identified an ...

State health officials are confirming six human cases of the H5 bird flu, with five more potential cases awaiting official ...

From the earliest days of the H5N1 bird flu outbreak in dairy cattle, experts watching the evolving situation have worried ...