Recently, the new H5N1 clade 2.3.4.4b caused an outbreak in U.S. dairy cows, subsequently transmitted to humans (dairy farm workers), threatening human health. Created with Biorender.

The H5N1 bird flu, spreading across all 50 U.S. states, raises concerns about a potential pandemic. The virus has impacted dairy farms, poultry flocks, and humans, with one confirmed human death ...

H5N1 is a specific strain of influenza A virus, also known as bird flu. The avian flu is a highly contagious respiratory disease that primarily affects birds, but can also infect other animals ...

“The recent emergence of highly pathogenic H5N1 avian influenza virus infections in dairy cows and humans in the U.S. has raised alarms regarding the potential for a pandemic,” they wrote.

The H5N1 bird flu virus has affected all 50 states in the US. Since March 2024, the virus has infected more than 1,000 dairy herds across the US, with more than 70 human infections.

What is the H5N1 situation in California? In California, Gov. Gavin Newsom declared a state of emergency in December to combat bird flu, which has spread to the state's dairies in the last month ...

“The recent emergence of highly pathogenic H5N1 avian influenza virus infections in dairy cows and humans in the U.S. has raised alarms regarding the potential for a pandemic,” they wrote.

Experts urge U.S. to prepare for possible new pandemic as H5N1 bird flu outbreak spreads with dairy animal and human cases. Here's what to know.

The H5N1 bird flu, spreading across all 50 U.S. states, raises concerns about a potential pandemic. The virus has impacted dairy farms, poultry flocks, and humans, with one confirmed human death ...

What is the H5N1 situation in California? In California, Gov. Gavin Newsom declared a state of emergency in December to combat bird flu, which has spread to the state's dairies in the last month ...

Experts urge U.S. to prepare for possible new pandemic as H5N1 bird flu outbreak spreads with dairy animal and human cases. Here's what to know.

Bird flu, also known as H5N1, has been around for decades. But the discovery in 2024 that the virus spread from wild birds to cows came as a surprise to public health experts, according to officials.