The different strain, D1.1, was recently found in cattle for the first time. Bird flu is continuing to spread across the U.S., and experts say they are "concerned" as public health officials attempt ...

Any time a person catches H5N1, or bird flu, their infection is a chance for the virus to mutate in the wrong direction. When someone dies from the bird flu—as an elderly Louisiana man did on Jan. 6, ...

A 13-year-old girl in British Columbia who was hospitalized with bird flu for several weeks late last year harbored a mutated version of the virus, according to a report published this week in the New ...

Receptor binding site of the A/Texas/37/2024 hemagglutinin Leu226 mutant (yellow) in complex with the human receptor analog LSTc (cyan). LA JOLLA, CA—Avian influenza viruses typically require several ...

H5N1 bird flu samples collected from a severely ill patient in Louisiana show signs of mutations that may make the virus more transmissible to humans, the Centers for Disease Control and Prevention ...