H5N1 bird flu has now crossed into U.S. dairy cattle for the first time, and alarmingly, it did so through just one spillover ...

A variant of the bird flu virus, collected in 2016 and no longer in circulation, was just one mutation away from being able ...

Avian flu strains tend to only affect birds, but the current outbreak has spread to cattle and – in rare cases – people. The ...

Fears the world is heading towards another pandemic are growing, as new data shows the spread of the deadly bird flu virus ...

A recent study has revealed that a single genetic change in a strain of the highly pathogenic H5 influenza virus could ...

Just as swine flu strains tend to infect pigs ... to sick birds or other sources of infection. Influenza viruses mutate in a special way called reassortment, which occurs when multiple strains ...

Just as swine flu strains tend to infect pigs ... Some of these genetic mutations cause no immediate differences, while others alter some key viral characteristics. Influenza viruses mutate ...