A genetic analysis suggests the bird flu virus mutated inside a Louisiana patient who contracted the first severe case of the illness in the United States

A patient in Louisiana has been hospitalized with a severe case of H5N1 bird flu, the US Centers for Disease Control and Prevention said, the first such case in the United States.

A person in Louisiana has been hospitalized with a severe case of the bird flu. It is the first known human H5N1 infection in the United States, according