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 ...

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 ...

MADRID -- The high-dose inactivated influenza vaccine may reduce older people's risk of hospitalization for flu or pneumonia more than a standard-dose shot, according to two large open-label, ...

Classical swine fever reduces productivity and harms animal welfare, but pigs have now been genetically edited to make them ...