Very few humans have gone up against bird flu. But we've all dealt with seasonal flu for years. Some of our immune systems might be primed to fend off a worse case, research finds.

The UK reports its first-ever case of reverse zoonosis—human flu infecting a pig—raising alarms about factory farming public ...

These are currently required because continuous mutation of the flu virus means ... with the emergence of the H1N1 'swine flu' subtype that killed an estimated 151,700 to 575,400 people worldwide.

An H5N1 bird flu mutation associated with increased infectiousness and disease severity has been found in two cats. Since the beginning of this year, more than 50 cats have been infected with H5N1 ...

BRIDGEWATER, S.D. – As bird flu ravages poultry farms across the country – including in South Dakota – fears are growing that the highly contagious avian influenza virus could mutate and ...

The central team of experts, who carried out an investigation to find out the origin and spread of H5N1 (bird flu) and the ...

But if the virus gains certain mutations, scientists fear it could ... pay off During the last influenza pandemic — the 2009 swine flu outbreak — people under 65 accounted for most of the ...