U.S. Centre for Disease Control Director Dr. Julie Gerberding walks past a Canadian flag as she arrives for a news conference wrapping up Health Canada's National Meeting on SARS in Toronto on Thursday, May 1, 2003. There were stark reminders Thursday that Toronto’s battle with SARS is not over, with the revelation that there may be two new cases among hospital workers. (CP PHOTO/J.P. Moczulski)