Researchers at the US Centers for Disease Control and Prevention (CDC) have identified a few instances of asymptomatic human infection with avian influenza A (H5N1) virus. Widespread in wild birds ...

The first person to contract H5N5 avian influenza, a rare strain of the disease known as bird flu, died in Washington state Friday. The state’s Department of Health said in a release the resident of ...

A man who became infected with a strain of bird flu previously never seen in humans has died, officials have confirmed.

A Western Washington resident is "very ill" after being exposed to the virus, a state health official said.