Canadian health officials said Wednesday that a fatal case of H5N1 bird flu has been reported in Canada, the first such case in North America. Health Minister Rona Ambrose said that the case, in Alberta, was an isolated one and that the risk to the general public is very low. Officials said that the person arrived in Canada via a flight from Beijing. There is no evidence that anyone else was infected by the victim. The World Health Organization (WHO) says that as of mid-December, there had been 648 laboratory-confirmed human cases of H5N1 flu, reported mostly in Asia. Of that total, 384 infections have been fatal. Experts say that the virus remains hard to catch with most human infections linked to contact with infected poultry.