A new H5N1 bird flu mutation has appeared in a cluster of infected dairy cows. It's a genetic change that scientists say ...

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

The mutation detected on the virus infecting a dairy farm worker in Texas has been recorded previously, the CDC said — and did not spark a major outbreak at that time. The change, on the PB2 ...

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.

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

the USDA reported finding that the D1.1 strain infecting cows in Nevada has a notable mutation known to help the bird-adapted virus replicate in mammals more efficiently (PB2 D701N). To date ...

The tests also identified some notable mutations. The Wyoming patient’s virus had the E627K mutation in the polymerase basic 2 (PB2) protein that has been linked to efficient replication in people and ...

The outbreak caused substantial mortality among wild birds, poultry, and marine mammals and included one confirmed human case. A comprehensive surveillance effort was conducted, involving the ...