An extensive look at wastewater samples taken across the United States from May to July found traces of the H5N1 bird flu ...

Avian flu in dairy cows could stick around on US farms forever, and is raising the risk of outbreaks in mammals—including ...

Mysterious US bird flu case in person without any known contact with an infected animal raises spectre of human-to-human ...

Bird flu has been spreading in dairy cows in the US—and the scale is likely to be far worse than it looks. In addition, 14 ...

Political apathy and selfishness in the face of outbreaks of bird flu and mpox show that the world has not learned from the ...

Genetic analysis of a bird flu virus detected in a person in Missouri who didn’t previously have contact with animals offers ...

San Diego County is now the fifth location in California to detect the bird flu, county officials announced Monday.

San Diego County is now the fifth locality in the state to report the environmental detection of H5 influenza virus or "bird ...

A close contact of someone with bird flu became ill on the same day, the C.D.C. reported. But the second person was not ...

A patient in Missouri who was hospitalized after an infection with bird flu had the H5N1 strain of the virus, the US Centers ...

A close contact of a Missouri resident identified as having a human case of the H5N1 avian flu also became sick around the ...

With the approach of fall and cooler weather across the United States, officials say the risk posed by the H5N1 bird flu ...