Most human cases of bird flu in North America have been mild, a fact that’s underscored by a new study of the first 46 confirmed human H5N1 infections in the United States this year. But the case of an ill Canadian teen stands out because of its severity and because the source of exposure remains a mystery.

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.

As of December 30, the CDC has confirmed 66 human cases of the bird flu virus in the United States. Most of them were mild infections among dairy workers and others who had contact with infected animals.

Health experts are raising concerns after genetic sampling of the first severe H5N1 bird flu case in the U.S. Map shows US states where 'damaging' Arctic blast will hit first - and more to come Look inside the Breakers,

In light of the ongoing global spread of the H5N1 avian influenza, U.S. public health experts are reassured that current treatments and vaccines are effective against severe disease. The virus, which has caused sporadic human cases,

In 2024, at least 66 human cases of bird flu have been reported in the United States, each one raising the risk of another pandemic like COVID-19. So far, most cases have been described as “mild,” which means they weren't hospitalized.