A 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. On Wednesday, the Public Health Agency of Canada (PHAC) confirmed it as avian flu — the first case of its kind in Canada. Henry said it's very likely that the B.C. teen's infection took place due to an exposure to either a sick animal or something in the environment.