bird flu

A teen in Canada may be the first person to catch an H5 bird flu virus within the country. Health officials are now working to confirm the diagnosis.

Rising H5N1 bird flu cases in the U.S. prompted the CDC to study the virus in ferrets, revealing it may have the potential to spread and cause severe symptoms in other mammals.

As of now, 17 states have reported H5N1 bird flu cases in humans, but there is still no evidence for transmission between people. Could that change?

The latest human case of bird flu in the U.S. occurred in a patient with no reported exposure to affected animals, sparking questions over whether the virus is spreading between people. Experts say that's unlikely but argue the case raises other concerns.

Bird flu in cows and goats has raised alarm in the U.S. To date, four people are thought to have caught the virus from cattle, but the risk to the general public is low.

A fourth person in the U.S. has caught bird flu after working with infected cows on a farm.

Scientists found that contaminated milking equipment can harbor the H5N1 virus for more than an hour, increasing the risk of dairy farmers getting infected.

A man in Mexico died after catching the world's first laboratory-confirmed case of H5N2 bird flu in humans. However, authorities think he likely died of existing conditions, rather than the infection itself.

New research in marine mammals suggests the virus is increasingly adapting to mammalian hosts.

This infection, tied to an ongoing outbreak in cows, is the first in the U.S. to cause respiratory symptoms, but not the first H5N1 case in the world to do so.