HHS Secretary Robert F. Kennedy Jr. and Secretary of Agriculture Brooke Rollins have expressed interest in letting H5N1 ...

67 cases of H5N1 bird flu have been recorded in humans since the beginning of 2024, according to the CDC, 38 of which were in California, 10 in Colorado, 11 in Washington, and the rest scattered ...

A flu virus like H5N1 experiences a special form of this tradeoff. In their current form, H5N1 grabs more tightly to receptors in the lower respiratory tract than the upper respiratory tract.

The H5N1 avian influenza virus has infected birds and mammals around the world. As of June 2025, 70 people have been infected ...

But the limb of the tree we’re dealing with now — H5N1 clade 2.3.4.4b — emerged in Europe in October 2020 when two bird flu viruses swapped parts. It came to the Americas in 2021.

Avian influenza, commonly known as bird flu, primarily affects birds and some cattle. However, a new study has shown that the H5N1 strain can spread through air, raising the risk of infections ...

Hulse-Post, DJ, Sturm-Ramirez, KM, Humberd, J, et al. Role of domestic ducks in the propagation and biological evolution of highly pathogenic H5N1 influenza viruses in Asia. Proc Natl Acad Sci U S ...

Experts have long recognized that the H5N1 virus that causes the disease has pandemic potential, just like COVID-19 or swine flu. In the past three years, ... New avenues for evolution.

The current spread of the HPAI H5N1 virus in dairy cattle in the U.S. will have been facilitated by the large herd sizes, ... Preventing Future Viral Evolution. Looking forward, ...

67 cases of H5N1 bird flu have been recorded in humans since the beginning of 2024, according to the CDC, 38 of which were in California, 10 in Colorado, 11 in Washington, and the rest scattered ...