The U.S. government failed to eliminate the virus on dairy farms when it was confined to a handful of states. Now at least 875 herds across 16 states have tested positive.

The Centers for Disease Control and Prevention is keeping close eye on pandemic indicators amid bird flu cases arising in the ...

A new mutation and the first severe case of H5N1 bird flu discovered in a human in Louisiana has raised concern among some ...

Doctors say the case of a teen left in critical condition shows H5N1 "can cause severe human illness." Mutations in the virus are deepening concerns about the spread of H5N1.

As the bird flu situation develops in the U.S., scientists told Newsweek the virus could become a pandemic--depending on what happens next. Right now, California is the epicenter of the outbreak ...

but this child tested positive for a strain of bird flu, called H5N1, which infectious disease experts worry could fuel the next human pandemic. The virus first emerged on poultry farms in Hong ...

The virus has been found in raw milk, deepening concerns about bird flu's spread. Experts discuss the symptoms and how to ...

The agency says it is looking for red flags, but the risk to the public still remains low. Meanwhile, a Louisiana patient with a severe case of bird flu showed worrying mutations in the samples ...

And if a bird flu pandemic was to break out, it would be "remarkably severe" in humans because we have no built-up immunity, she added. The US farm worker cases have been relatively mild so far.

Health experts have been sounding the alarm about the potential pandemic threat posed by bird flu, which has been showing signs of mutating as it spreads among cows and infects people in the ...