A dangerous type of bird flu virus (called H5N1) continues to circulate among dairy cows in the US. The virus targets the ...

Hungary reported a first outbreak of highly pathogenic H5N1 bird flu on a farm this season, the World Organisation for Animal ...

Questions abound about how to best inoculate the world against swine flu as health officials plan for a campaign that could dwarf any previous flu vaccination effort. Among the issues to be resolved ...

Immunologist Zachary Rubin explains how the World Health Organization decides which strains of influenza end up in annual flu ...

Experiments suggests H9N2 has adapted to human cells, but cases of person-to-person transmission haven’t been reported yet ...

The upswing in infections echoes a pattern from last year, when a slow increase in outbreaks in October and November led to ...