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

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 ...

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

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

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

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

A potentially deadly new strain of the swine flu virus cropped up in more places in the United States and Mexico on Saturday, in what the World Health Organization called "a public health emergency of ...

After a summer lull in U.S. cases of avian influenza in both poultry and dairy cattle—and no human infections reported in the ...

Bird flu can survive in certain raw milk cheeses for months—even after the aging process that’s supposed to make them ...

After a quiet summer, bird flu cases are rising again. Scientists expected the development, but what happens next is still ...

In the Southern Hemisphere, the adjusted flu vaccine effectiveness rates against outpatient visits and hospitalizations were 50.4% and 49.7%. Only 21.3% of flu outpatients and 15.9% of hospitalized ...

Japan is facing a nationwide flu outbreak. Cases have surged significantly, leading to hospitalizations and school closures. This epidemic has arrived nearly five weeks earlier than expected. Health ...