H5N1 Bird Flu Circulating in Dairy Cows in the United States
The clade of highly pathogenic avian influenza (HPAI) viruses causing outbreaks in wild and domestic birds around the world, is appearing in dairy farms across several U.S. states since at least April 2024.
CDC A(H5N1) Bird Flu Response Update
CDC provides an update on its response activities related to the multistate outbreak of avian influenza A(H5N1) virus, or "H5N1 bird flu," in dairy cows and other animals in the United States.
News
Policy & Recommendations
CDC Confirms Three Human Cases of H5 Bird Flu Among Colorado Poultry Workers
Three additional human cases of highly pathogenic avian influenza (HPAI) A(H5) (“H5 bird flu”) virus infection have been confirmed by the Centers for Disease Control and Prevention (CDC) in association with a second poultry farm in Northeast Colorado.
Human H5N1 cases in the U.S. are rising. That's bad timing with flu season, bird migrations just months away
Cluster of infections among Colorado farmworkers could signal new challenges ahead
Spillover of highly pathogenic avian influenza H5N1 virus to dairy cattle
Highly pathogenic avian influenza (HPAI) H5N1 clade 2.3.4.4b virus has caused the death of millions of domestic birds and thousands of wild birds in the U.S.
Strain-dependent variations in replication of European clade 2.3.4.4b influenza A(H5N1) viruses in bovine cells and thermal inactivation in semi-skimmed or whole milk
Cattle were once thought to be resilient to avian influenza virus (AIV) infections [1], until the recent widespread influenza A(H5N1) virus infections in dairy cattle in several states in the Unites Stares (US) since March 2024 [2].
Article
Scientific Papers
Déjà Vu All Over Again — Refusing to Learn the Lessons of Covid-19
The spread of H5N1 avian influenza among cattle and other farm animals as well as to agricultural workers in the United States has raised concerns about the potential for an influenza pandemic.
Understanding the Threat of Bird Flu
Since 2022, a new, highly pathogenic strain of H5N1 influenza or “bird flu” has spread worldwide.
News
Policy & Recommendations
CDC Confirms Human Cases of H5 Bird Flu Among Colorado Poultry Workers
Four human cases of highly pathogenic avian influenza (HPAI) A(H5) (“H5 bird flu”) virus infection in the state of Colorado
The evolution, complexity, and diversity of swine influenza viruses in China: A hidden public health threat
Swine influenza viruses (SIVs), including H1N1, H1N2, and H3N2, have spread throughout the global pig population.
CDC A(H5N1) Bird Flu Response Update
CDC provides an update on its response activities related to the multistate outbreak of avian influenza A(H5N1) virus, or "H5N1 bird flu," in dairy cows and other animals in the United States.
US cases of avian flu in cattle are causing concern. How prepared is Europe for the bird flu threat?
Scientists are raising the alarm about US cases of H5N1 in cows as transmission to humans is easier. Here in Europe, steps are being taken to prepare.
