"The Chinese poultry lineage may have experienced more vaccine-driven selection compared to other lineages," the researchers wrote.

Over 160,000 people this season have landed in the hospital from flu complications, CDC estimates. More than 6,600 have died.

Seven Delmarva-region commercial operations have now reported cases of the highly contagious virus.

The Centers for Disease Control and Prevention are monitoring the bird flu situation in the United States. Here's what to ...

A few cats have died from bird flu after eating raw food. And some raw pet food products have been recalled. Here's what to ...

Avian influenza A (H5N1) has mutated, so the symptoms of bird flu could change as more people get sick in 2025.

The H5N1 virus has mutated meaning it has begun to adapt to infect humans better raising new questions about H5N1's pandemic potential.

After bird flu was found in a Georgia commercial poultry facility for the first time, a second and even larger flock nearby has tested positive for the virus.

More than a dozen cats have been killed or sickened by bird flu that is spreading in raw food products, the Food and Drug Administration says, prompting a federal probe into how the virus got into the ...

Mike Pentella, professor of epidemiology in the University of Iowa College of Public Health and director of the State Hygienic Laboratory at the UI, explains that bird flu is a disease caused by ...

Bird flu is increasingly sparking concern across the country and in Illinois, following news this week of the first human ...

Influenza, or the flu, is a contagious respiratory virus. It can be a severe illness that affects the nose, throat and sometimes lungs. Symptoms of influenza are sore throat, cough, congestion ...