The California duck farm's strain of H5N9 is different from those earlier cases because this time it is closely related to a newer variant of the H5N1 virus.

H5N9 and H5N1 are two strains of bird flu that have recently sparked concern, especially after a significant outbreak at a ...

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

A new strain of bird flu — H5N9 — has been detected in California’s Merced County at a commercial duck operation. According to the World Organization for Animal Health — an international ...

H5N9 is a rare strain of avian influenza. H5N1 is the more common strain of the bird flu and has been responsible for most of the reported human cases. H5N1 was responsible for the first human ...

A new bird flu (highly pathogenic avian influenza) outbreak has been discovered in California. The newly reported H5N9 strain was found Monday at a duck farm in Merced County, ...

The World Organization for Animal Health said in a Jan. 27 notification that the H5N9 strain of avian bird flu has been detected for the first time at a duck farm in Merced County, California.

MERCED COUNTY, Calif. (KSEE/KGPE) – The country’s first case of H5N9 bird flu has been identified in Merced County, California, officials say. This H5N9 strain, which was identified earlier ...

The United States has reported its first outbreak of H5N9 bird flu on a duck farm in California, according to the World Organization for Animal Health (WOAH) on Monday. Why It Matters.

Where was the California H5N9 outbreak? The USDA said the virus was detected at a "commercial duck meat" farm in California's ...