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

The agency, in its latest update released Thursday, said the mutations were not found in samples taken from wild birds, suggesting the virus changed over the course of the patient’s infection.

The Centers for Disease Control and Prevention (CDC) has identified mutations in the H5N1 bird flu virus that may increase ...

However, the CDC tests showed no "flu A," a category that includes both bird flu and seasonal flu ... State and federal health officials say the H5N1 risk to the general public is low, but ...

Two human cases of H5N1 avian flu have been confirmed in San Joaquin County, health officials reported Friday. The cases occurred in farmworkers with known exposure to infected animals, and both ...

“The individual had exposure to sick and dead birds that are suspected to have been infected with H5N1,” the ... report from the CDC found evidence of asymptomatic bird flu infections in ...