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

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

Bird flu infections have been rare among people, but the pathogen is evolving, which has scientists worried about a possible ...

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

Immunity Against Seasonal H1N1 Flu Reduces Bird Flu Severity in Ferrets, Study Suggests Feb. 26, 2025 — Pre-existing immunity against seasonal H1N1 flu might help explain why most reported human ...

Influenza B has never caused a pandemic. Both swine and avian influenza are strains of influenza A. Just as swine flu strains tend to infect pigs, avian flu strains tend to infect birds.