Bird flu, also known as the highly pathogenic H5N1 avian influenza, has been making the rounds in the United States over the last year and appears to be resurging again, according to officials with the Centers for Disease Control and Prevention.

How deadly is the bird flu? The US has reported its first death from avian influenza, H5N1. Here's what to know about bird flu mortality rate and who is at risk.

As concerns about bird flu rise in the U.S., a new study is warning about the virus' ability to mutate in humans. Dr. Amish Adalja, an infectious disease physician, joins "The Daily Report" to discuss the study and how concerned people should be about the disease.