After a summer lull in U.S. cases of avian influenza in both poultry and dairy cattle—and no human infections reported in the country since February—the virus is back. The currently circulating bird ...

The CDC says bird flu is a disease caused by avian influenza A viruses (H5N1) that usually spread between birds, not people. It occurs naturally among wild aquatic birds. It's very contagious among ...

Influenza viruses are shifty entities. They accumulate small genetic changes on a regular basis, necessitating yearly updates to the flu vaccines because the prior year’s strain may not look much like ...

As birds fly south for the winter, they're carrying with them some unwelcome cargo: the H5N1 virus, or bird flu. In the past 30 days, the virus has struck 66 poultry flocks, leading to the deaths of ...

March 18 (Reuters) - Hello Health Rounds Readers! Today we feature a study that found seniors may be less vulnerable to bird flu than younger adults and children. We also report on studies that could ...