In other developments, a Chinese research team that studied experimental infections involving different inoculation routes ...

The current clade, 2.3.4.4b, was first detected in wild birds in the United States in late 2021 and is well adapted to spread throughout wild birds and poultry. ... HPAI was first detected in China in ...

This current clade 2.3.4.4b HPAI A(H5N1) virus has been detected in wild birds in all 50 states and has caused bird outbreaks in 47 states. Dr. Tim Uyeki, Chief Medical Officer of the Influenza ...

H5N1-HPAI-clade 2.3.4.4b started out as a milder influenza, a so-called low pathogenic avian influenza circulating in the wild. For its own survival, a virus shouldn’t kill its host, ...

HPAI H5N1 clade 2.3.4.4b viruses have increasingly caused mammalian outbreaks over the past few years. In the United States (US), outbreaks have been detected in cows since Spring 2024, ...

"These results demonstrate the transmission of HPAI H5N1 clade 2.3.4.4b virus at a non-traditional interface underscoring the ability of the virus to cross species barriers." ...

HPAI viruses have caused significant disease outbreaks globally, particularly since 2016, when HPAI clade 2.3.4.4b emerged. These viruses primarily affect birds, ...

As of April 24, confirmed cases of HPAI H5N1 clade 2.3.4.4b have been found in 8 states on 33 dairy cattle premises. Those states include Kansas, Idaho, Michigan, New Mexico, ...

Dec. 6—A highly pathogenic avian influenza — HPAI — has been found in a flock in northeastern Oklahoma and culled after the fowl were found positive for the virus, experts said. An article ...

Highly pathogenic avian influenza has been detected in three additional dairy herds in Michigan, the state’s Department of Agriculture and Rural Development (MDARD) announced Friday.