With 55 human cases in the US and avian influenza impacting bird populations across the globe, here’s a look at why ...

The avian flu virus isolated from a hospitalized teenager in Vancouver has mutations in key areas that could help the virus ...

Efforts to contain the virus are falling short. A teenager in Canada is in critical condition after an unexplained infection.

Canada's first H5N1 bird flu case in a teenager has raised concerns over potential mutations enabling human infection. With ...

Why now: With reservoirs of virus persisting in dairy cattle, poultry and wild birds, there are ample opportunities for ...

Canada has also just reported its first known case of bird flu in humans, a teenager who is currently in a critical condition ...

CBS News medical contributor Dr. Celine Gounder joins "CBS Mornings" to discuss the latest on bird flu as new cases raise ...

Just this weekend, the CDC confirmed a mild case in a child who had no known exposure to an infected animal. There have been several cases like this one over the past few months.

The warning came five days after the CDC confirmed that a child had tested positive for bird flu in California.

A Seattle-based virology expert weighs-in on human-to-human spread and why animal farm workers should be vigilant.

In a development that health experts have warned might come, Canadian officials report that the bird flu virus isolate ...

In an indication that the bird flu outbreak is "headed in the wrong direction," sequencing of the virus that has stricken a ...