In a troubling development, the highly pathogenic H5N9 avian flu has been detected in U.S. poultry for the first time. The outbreak occurred at a duck meat farm in Merced County, California ...

The virus, called highly pathogenic H5N9, is a type of avian influenza, otherwise known as "bird flu." This is not the same type of bird flu that's already been spreading on dairy cow and poultry ...

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 ...

In late January, scientists at the World Organization for Animal Health (WOAH) reported the first cases of H5N9 avian influenza in the U.S., on a duck farm in California. The latest strain isn’t ...

PARIS — The first outbreak of H5N9 bird flu has been reported in poultry on a duck farm in California, the World Organization for Animal Health said on Monday. U.S. authorities also detected the ...

US animal health officials were conducting "comprehensive epidemiological investigations" and had increased surveillance in response to the outbreak, the WOAH said. Health experts have been ...

An in-house reverse-genetics generated H5N9 inactivated vaccine (SEP-22- N9) was evaluated for its vaccine efficacy in ...