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

The CDC has confirmed a total of 66 human cases of bird flu across the United States as of Friday, although the number is believed to be higher.

H5N1 bird flu samples collected from a severely ill patient in ... One of the mutations was also seen in a sample from a British Columbia teenager who was hospitalized with bird flu, the CDC said.

commonly known as bird flu, less than a month after a child in California was diagnosed with the virus. On Friday, the CDC confirmed a person from Louisiana had avian influenza A virus, H5N1 ...

This is also the first case of H5N1 bird flu in the U.S. that has been linked to exposure to a backyard flock, a news release noted. The case was first confirmed by health officials Friday ...