The newly reported H5N9 strain was found Monday at a duck farm in Merced County, California, according to the World ...

A California duck farm made headlines this week after the World Organization of Animal Health published a report by U.S.

First U.S. detection of virulent H5N9 strain, at a California duck farm, draws scrutiny as evidence of genetic reassortment ...

A new strain of H5N9 bird flu was detected at a commercial duck operation in California's Merced County. All the ducks were ...

The government is investigating a rare strain of avian flu, H5N9, detected on a duck farm in central California, according to ...

Health officials have detected a new strain of bird flu, the H5N9, raising concerns about potential changes in the virus.