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... Bird flu typically spreads from animal to animal, but has jumped to 46 humans in the U.S. this year, all of whom interacted with infected cows or poultry, according to the Centers for Disease Control and Prevention. It is unknown how the Canadian teen acquired the disease.

Officials have been conducting contact tracing to prevent the spread to others. ...

The Public Health Agency of Canada is working with our human and animal health partners to swiftly investigate and respond to this case," said Dr. Theresa Tam, chief public health officer of Canada. "This detection was picked up via hospital -based influenza surveillance, confirming that human influenza surveillance in British Columbia and Canada is effective at detecting avian influenza A(H5). We must continue to remain vigilant in our efforts to prevent the spread of avian influenza between animals and to humans." ...