They are bracing for a brutal season, driven by a new and alarming variant that is expected to circulate widely.

Known as subclade K, a new, mutated flu strain that has dominated in Europe and Asia is now rapidly spreading across the US.

A new study has uncovered a terrifying trait in bird flu viruses — they can survive even during high fevers, one of the body’s strongest defenses against infections. Researchers from Cambridge and ...

Bird flu has always worried pandemic planners, but a new twist is raising the stakes: scientists are now tracking variants ...

Although development of a jab for the H5N1 strain of avian flu is well under way, other strains are receiving less attention ...

Avian influenza is devastating poultry operations, spreading in dairy cattle and infecting farm workers. Why isn’t the United ...