The CDC says it appears the H5N1 virus contained mutations in the Louisiana patient who contracted the nation’s first severe case of the illness. Dec. 28, 2024 ...

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 CDC recently reported findings from an analysis of specimens collected from the patient in Louisiana who became severely ill from H5N1 avian flu, and found genetic mutations that, according to ...

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