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.

Here’s what to know about the United States’ first confirmed severe case of H5N1 avian influenza—and how to protect yourself.

The ongoing spread of bird flu in the United States has alarmed experts -- not just because of human cases causing severe illness, but also due to troubling new instances of infections in cats.

The first severe case of H5N1 bird flu was confirmed in Louisiana. Here is a map of other states that have been affected.

A new bird flu mutation of H5N1 has been discovered in a patient in the US state of Louisiana. Public health officials are concerned the new strain may rapidly develop, increasing its ability to affect humans.

Genetic samples from the patient contained mutations that could, in theory, help the virus better infect human cells.

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

HPAI is considered low risk to humans, the agency said, and there have been no human cases in New England during the current outbreak. The post Bird flu detected in small backyard flock in Vermont appeared first on Boston.

Federal health officials say that not only has a Louisiana resident contracted the first severe case of bird flu in the U.S., but that the virus likely mutated in the patient. The findings raise concern regarding the adaptability of the virus.