Genetic analysis of H5N1 bird flu virus that infected a Canadian teenager shows 'worrisome' mutations, new studies reveal.

A 13-year-old Canadian girl recovered after being hospitalized in critical condition with H5N1 avian influenza, researchers reported. The girl was hospitalized on Nov. 7 and transferred to BC Children's Hospital the next day,

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.

When, where and how the H5N1 bird flu virus may evolve and its capacity to spark a pandemic is hard to predict — in part, some researchers say, because of federal restrictions on gain-of-function research.

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

Federal health officials have confirmed unsettling new details about the first United States case of severe bird flu, reported recently in a hospitalized patient in Louisiana. Genetic samples from the patient contained mutations that could,

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,

It’s not unusual to see heightened concern for the spread of viruses during the winter months, including the bird flu, or H5N1. The first severe human case in the United States was found in Louisiana in mid-December.