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

The virus has spread among dairy cattle, humans and other mammals. But officials say the current public health risk is low.

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 ...

Experts and some public officials are warning against raw pet foods after a cat in Oregon was found to have died from a product contaminated by bird flu.

So far, the H5N1 virus isn't transmitted between people — but the CDC has found a mutation in a human case "concerning." ...

As for testing, the girl's first swab at BC Children's was positive for influenza A but negative for H1 or H3 disease.

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A man in Mexico has died in what the World Health Organization (WHO) has said is the first lab-confirmed human infection with the H5N2 strain of bird flu. The 59-year-old Mexico City resident ...

More than 50,5 million birds in US poultry farms have been slaughtered because of outbreaks of avian flu among flocks in ... Over 4.6 million birds died or were culled between mid-October and ...

PORTLAND, Ore. (AP) — An Oregon house cat died after eating pet food that tested positive for bird flu, Oregon authorities said, prompting a recall of raw frozen pet food that was sold nationwide.