The HPAI H5N1 virus has spread globally, infecting birds, mammals, and some humans. Most human cases are mild.

Public-health experts have been highly critical of the federal and state response to the virus, which was first identified in cows in the U.S. early in 2024.

Feeling under the weather? Local health officials are tracking a variety of viruses making rounds in the community right now.

Gov. Newsom declared a state of emergency as the virus continues to infect dairy herds across the country — including more ...

Doctors say the case of a teen left in critical condition shows H5N1 "can cause severe human illness." Mutations in the virus are deepening concerns about the spread of H5N1.

All year, I’ve been keeping tabs on the H5N1 avian flu outbreak in dairy cattle and birds in the United States. As a ...

The UK government has ordered five million doses of an avian influenza vaccine in case it starts being spread by people as ...

In 2024, at least 66 human cases of bird flu have been reported in the United States, each one raising the risk of another ...

The project is the brainchild of Dr. Robert Webster, a New Zealand virologist who was the first to understand that flu ...

Although the risk to the general public is still considered low, there have been at least 65 confirmed human cases in the U.S ...

California officials have declared a state of emergency over the spread of bird flu, which is tearing through dairy cows in ...

This month the California Gov. Gavin Newsom declared a state of emergency after epidemiologists confirmed the spread of bird ...