A teenager has been left in critical condition after contracting the first presumptive human case of avian influenza in Canada. Expert Sam Scarpino discusses the health risk and potential for spread.

This marked "the first detection of a presumed human case" of H5 in Canada, authorities in British Columbia said. View on euronews

Cases of H5N1 bird flu in U.S. dairy and poultry workers have largely been mild. However, a new case in a British Columbia teenager has experts worried.

A Canadian teenager infected with bird flu — that country’s first case involving a locally acquired infection — is in critical condition and experiencing difficulty breathing, health officials said Tuesday.

A teenager is in critical condition in a British Columbia children’s hospital with what is likely Canada’s first human case of H5 bird flu

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

Initial testing had indicated the teenager’s infection was from bird flu and was confirmed in further testing, the Public Health Agency of Canada said in a statement. The teen has been hospitalized in Vancouver since Friday and was reported in critical condition on Tuesday.

It is not known how the teen contracted bird flu, according to British Columbia health officials A teenager in British Columbia, Canada, is in critical condition after contracting the first presumptive case of bird flu in the country,

A Canadian teenager is hospitalized in critical condition with bird flu, health officials reported Tuesday. The teen has been receiving care at BC Children’s Hospital in Vancouver since Friday, the same day an initial test came back positive for H5 influenza.