Bird flu, or avian influenza, is a rare but serious disease that can spread from birds to humans under certain conditions. So ...

The H5N1 strains are becoming more concerning as the first severe U.S. case has been detected and California declared a state ...

Officials have discovered the virus in 645 dairy herds, more than in any other state so far. In a stark acknowledgment of the ...

The Centers for Disease Control and Prevention called it the first severe case in the U.S., though the risk to most of the public is still low.

The virus has been found in raw milk, deepening concerns about bird flu's spread. Experts discuss the symptoms and how to ...

Here’s what to know about the United States’ first confirmed severe case of H5N1 avian influenza—and how to protect yourself.

For influenza viruses, imperfection is a strength. They constantly mutate, producing new strains that challenge immune ...

Commonly known as bird flu, the H5N1 avian influenza virus is found in wild aquatic birds across the globe and can also cause outbreaks and disease in ...

Health officials say getting your regular flu vaccine is still a good idea to avoid getting sick and confusing it with bird ...

The first severe human case of H5N1 in the U.S. and California's state of emergency are deepening concerns about the spread of the virus. How to prevent getting sick.

A Stanford study shows that raw milk can harbor the flu virus for up to five days, stressing the importance of pasteurization ...