The Canadian Food Inspection Agency (CFIA) has also been testing milk for signs of H5N1 in dairy cows. Canada has had no cases of H5N1 reported in dairy cattle. There's also no evidence of bird flu in samples of commercial milk. "Milk and milk products that have been pasteurized are safe to consume," the Public Health Agency of Canada said.

Health officials in British Columbia have reported the first presumptive case of H5 avian influenza in a human in Canada.

A British Columbia teenager is in critical condition with Canada's first presumptive human case of avian influenza. Officials suspect the H5N1 strain, known to have low human transmission risk. Despite no known human-to-human spread,

A B.C. teenager remains in hospital with avian flu, according to British Columbia's top doctor. On Tuesday, Provincial Health Officer Dr. Bonnie Henry said the teen is suffering from severe respiratory distress.

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.

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.