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.

A sample of the virus found in a critically ill patient in the US has shown signs of mutating to better suit human airways, ...

A genetic analysis suggests the bird flu virus mutated inside a Louisiana patient who contracted the nation’s first severe ...

After someone in southwest Louisiana was hospitalized with a severe case of bird flu, the first such illness reported in the ...