Avian influenza H5N1 infection in humans has spread to seven U.S. states, growing from 46 cases last week to 52 cases this week.

The genetic sequence of the H5N1 bird flu virus that infected a teenager in British Columbia shows that the virus had undergone mutational changes that would make it easier for that version of H5N1 to ...

It’s been nearly eight months since avian flu was first detected in U.S. dairy herds, and cases in both cows and humans continue to pile up. That slow burn of infections through our nation’s livestock ...

So far, there have been 52 confirmed cases of avian influenza, commonly referred to as the "bird flu," in humans in 2024. Two of the infected patients have been in Missouri.

The Oregon Health Authority said there's no evidence of person-to-person transmission and the risk to the public is low.

Reports this week of a teen in British Columbia who tested positive for H5 avian influenza has renewed attention on the virus ...

With 46 U.S. cases and alarming signs of the virus crossing species, experts warn of unpredictable risks if human-to-human ...

A teenager in Canada is critically ill with the country's first human case of H5N1 bird flu. Health officials aren't sure how ...

Oregon confirms its first human bird flu case, the latest in dozens of cases in the U.S. this year. Experts discuss the ...

Amid an ongoing outbreak of bird flu in American dairy herds and poultry flocks, Canadian officials have announced ...

It's not clear how the British Columbia teenager picked up the virus, which has been detected recently in wild birds and ...