A genetic analysis of samples from the patient in Louisiana recently hospitalized with the country’s first severe case of H5N1 bird flu show the virus likely mutated in the patient to potentially become more transmissible to humans, but there’s no ...

The U.S. Centers for Disease Control and Prevention said on Thursday its analysis of samples from the first severe case of bird flu in the country last week showed mutations not seen in samples from an infected backyard flock on the patient's property.

The first severe case of bird flu in the US includes unique mutations, as per CDC. These mutations, found in the patient's respiratory sample, are rare but typically seen during severe infections. The mutations may enhance the virus's ability to infect human cells but haven't been found in birds,