First U.S. detection of virulent H5N9 strain, at a California duck farm, draws scrutiny as evidence of genetic reassortment ...
Highly pathogenic avian influenza H5N9 has been identified in U.S. poultry for the first time, after outbreak at a commercial ...
A new bird flu strain was detected on a California duck farm. But what's the difference between H5N9 and H5N1, and is it safe ...