A person in Louisiana has been hospitalized after being exposed to sick and dead birds. Meanwhile, California has declared an emergency over its growing outbreak in cattle.

The virus has spread to over 710 dairy herds across 15 states, with California reporting the highest number of infections. At least 58 people have been infected with bird flu, including one child.

A person has tested positive in British Columbia, Canadian health officials said, though the results must be sent to another lab for confirmation.

The discovery of an infected pig at a backyard farm in Oregon raises concerns about bird flu's potential to become a human threat.

The price of eggs has risen by about 28% in the past year, largely due to outbreaks of avian flu. Those prices could continue to climb during the holidays, as demand for baked goods increases.

So far, there have been 14 human cases of bird flu this year. All the patients — except the one from Missouri — had been linked to sick dairy cows or poultry.

Corn dogs, deep-fried Twinkies, butter sculptures and influenza virus? Here’s why state fairs could be potential breeding grounds for viral mutation.

Dairy workers in Texas show signs of prior, uncounted bird flu infections in a new study. Without better surveillance, researchers warn that health officials could be caught off guard if the virus gets more contagious.

A recent crop of human cases at a chicken farm highlight the risks of the ongoing outbreak. Here's what scientists fear could happen next in the evolution of the virus.

Three months into the U.S. bird flu outbreak, only 45 people have been tested and clinical labs aren't approved to detect the virus. They complain of slowness and uncertainty from the CDC and FDA.

An avian flu outbreak in dairy herds has stoked tensions between the federal government and raw milk advocates. Milk testing could provide assurances and useful data, but some farmers oppose it.

There have been no reported cases of HPAI in Georgia among people or dairy cows since traces of the virus was found in pasteurized milk last month.  

Federal health officials say the U.S. has the building blocks to make a vaccine to protect humans from bird flu, if needed. But experts warn we're nowhere near prepared for another pandemic.

Officially, only one person has caught the illness during the current outbreak. But with limited testing, cases could be flying under the radar.

Health officials say there's very little risk to humans from the bird flu outbreak among dairy cattle, but there's still much they don't know. Here are four questions scientists are trying to answer.