"The Chinese poultry lineage may have experienced more vaccine-driven selection compared to other lineages," the researchers wrote.

It is possible H5N9 might have arisen through "reassortment" in the birds, where H5N1 can genetically mix with other influenza viruses inside of an infected animal. "H5N1 reassorts with other ...

The Centers for Disease Control and Prevention are monitoring the bird flu situation in the United States. Here's what to ...

All nine macaques given the control developed severe disease when exposed to bird flu, as did all given the smallest dose of ...

Here's what you need to know about the highly pathogenic H5N1 avian influenza, and what bird flu might mean to you, your ...

The findings come at a time when outbreaks of bird flu -- a different subtype of the ... diagnosed with influenza, a recent study reports an ... Single Mutation in H5N1 Influenza Surface ...

A subtype of bird flu caused by avian influenza A (H5 ... Currently, no avian influenza A viruses, including avian influenza A(H5N1), have gained the ability to spread easily and ...