A subtype of bird flu caused by avian influenza A (H5) virus has been spreading worldwide in wild birds with a few outbreaks ...

While the H5N1 bird flu keep spreading, the first reported H5N9 outbreak in the United States has been identified on a duck farm in California.

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

Influenza type B viruses are not classified by subtype and do not cause pandemics. Different strains of the flu virus mutate over time and replace the older strains. This is why it's important to ...

Learn more about how a vaccine could help prevent the spread of the avian flu virus but may also cause the virus to evolve ...

H5N9 is a rare subtype of the influenza A virus that can cause highly pathogenic avian influenza (HPAI), also known as bird flu. It's a reassortment strain that originated from the H5N1, H7N9, and ...

A subtype of bird flu caused by avian ... According to the CDC, Bird flu is a disease caused by avian influenza A viruses that usually spread between birds, not people. Most human cases of bird ...

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A team of virologists, infectious disease specialists and pathobiologists affiliated with several institutions in China and ...

The virus was reported in a commercial flock of ducks. It’s the first time the subtype has been detected in the United States ...

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