Public health experts are urging vigilance amid recent reports of severe bird flu cases in two North American patients.

Dozens of cats across the U.S. have tested positive for avian flu, federal officials say. The west coast has been hit especially hard.

Previous seasonal flu infections and vaccinations may protect us against infection from the highly pathogenic H5N1 bird flu outbreak.

Although bird flu has been around for a while, University Health Chief Medical Officer Dr. Bryan Alsip said its dangers are ...

A Canadian teen's severe bird flu infection has highlighted growing concerns about the H5N1 virus, commonly known as bird flu ...

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.

A fter invasive rats caused their disappearance from the island of Kamaka over a century ago, Polynesian storm-petrels have ...

Bird flu has landed in Los Angeles. Officials from the LA County Department of Public Health reported that several cats tested positive for the bird flu, also called H5N1, after […] ...

So far, the H5N1 virus isn't transmitted between people — but the CDC has found a mutation in a human case "concerning." ...

Here's what the latest research is saying about how it is spreading and how to keep yourself and your pets safe.

First come the horseshoe crabs. Hoisting their round, tank-like shells, they trundle out of the Delaware Bay under the first ...

This year has been marked by concerning developments in the virus’ spread, including widespread detections in wastewater and ...