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

A teenager has been left in critical condition after contracting the first presumptive human case of avian influenza in ...

A teenager in British Columbia was hospitalized in critical condition with the disease, and officials were working to find ...

A Canadian teenager infected with bird flu — that country’s first case involving a locally acquired infection — is in ...

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

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

A teenager in British Columbia has become the first person in Canada to test positive for bird flu, authorities said Saturday ...

Since the first positive test this summer, the state of California has seen 22 confirmed cases of bird flu in humans.

British Columbia health officials said on Saturday the province had detected Canada's first human case of H5 bird flu in a ...

British Columbia health officer Dr. Bonnie Henry shared in a news conference that a teenager, who contracted the first ...

The World Health Organization voiced alarm at the growing spread of H5N1 bird flu to new species, including humans, who face an ‘extraordinarily high’ mortality rate. Hong Kong should test for ...

Scientists have voiced concern about the growing number of mammals becoming infected by bird flu, even if cases in humans remain rare. They fear a high rate of transmission could facilitate a ...