Highly pathogenic avian influenza A(H5) virus continues to spread through U.S. dairy herds and poultry flocks more than two ...

H5N1, also known as avian influenza, is a subtype of influenza virus that infects birds and mammals, including humans in rare instances, says the World Health Organization (WHO).

On November 13, Spain's Ministry of Agriculture, Fisheries and Food imposed the confinement of all free-range poultry farms to curb the spread of avian influenza—more commonly known as "bird ...

H5N1 strains have been circulating among wild and domestic birds in the U.S. since 2021. In 2024, it began to cause outbreaks in dairy cows. It also became apparent that cats could catch H5N1 from ...

The H5N1 strain has a history of causing severe illness in humans, with a global death rate of about 48 percent between 2003 and 2025, based on nearly 1,000 cases reported to the World Health ...

This is the first case of the virus reported in the state this year.

While the disease primarily affects birds, health experts say certain strains of the virus, especially H5N1, can occasionally infect humans and cause severe illness.

H5N1 bird flu has infected growing numbers of people worldwide in recent years, but this week saw something new: the first recorded human case of an H5N5 avian influenza virus. What is this virus and ...