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

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 ...

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 ...