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

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 ...

California is investigating five possible human cases of bird flu among dairy farm workers, in addition to the six cases ...

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

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

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

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

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

While the risk to the public remains low, three cases of bird flu have now been reported in humans in California.

The Centers for Disease Control and Prevention said Thursday California has confirmed a third human case of H5 bird flu. All ...

California on Thursday confirmed a fourth case of bird flu in a person who had contact with infected dairy cattle.