A genetic mutation of H5N1 detected in California dairy cows raises concerns about increased mammal-to-mammal transmission ...

Bird flu makes millions of copies of itself within ... the CDC said — and did not spark a major outbreak at that time. The change, on the PB2 gene linked to how the virus makes copies of itself ...

Experts warn of concerns over U.S. bird flu outbreak as federal agencies struggle to rehire fired employees. Updates on mutations and response efforts here.

Scientists are sounding the alarm about a concerning genetic mutation of the H5N1 bird flu virus, recently identified in four ...

Yoshi Kawaoka: So in the past, there are avian influenza viruses that are in migratory waterfall [that] acquired mutations in PB2 proteins that make the virus replicate better in mammalian species ...

The mutation, known as PB2 E627K, was detected in sequence data ... were uploaded to the Global Initiative on Sharing All Influenza Data (GISAID), a Germany-based public genetic repository.

The New York City health department provided an update Saturday on raw pet food leading to bird flu cases in cats.

A Brooklyn kitten has been identified as the second confirmed feline victim of avian flu in New York City — having contracted ...