Over the past three years, avian influenza (H5N1) has spread around the U.S. and affected many species of birds and mammals, ...

Preliminary test results indicate a commercial chicken farm in Brazil's state of Tocantins is free from bird flu, a disease ...

Health officials are making a renewed call for vigilance against bird flu​, but some experts are puzzling over why reports of ...

How dangerous is it? Where did it come from? H5N1 influenza’s origins stretch back to the 1990s, and key events paved the way ...

Infected cats often suffer from acute encephalitis (brain swelling) and other severe symptoms, which are mistaken for rabies, according to the study. The most deadly strain of bird flu is highly ...

Outbreaks of bird flu in mammals more than doubled across the world last year, raising the risk that the virus could ...

The first death caused by H5N1 bird flu was reported in January 2025. Some believe the virus could eventually pose a widespread risk to the public.

Federal and state authorities confirmed a case of highly pathogenic avian influenza in a poultry market but also see a "downward trend" in reports.

Researchers identified a novel genotype (D1.1) of highly pathogenic avian influenza H5N1 spreading among wild birds, poultry, ...

The CDC also provides guidance on what symptoms of bird flu in humans may look like. Though signs and symptoms vary, eye redness is a predominant symptom among recent U.S. cases of bird flu infection.