Additional qualifications include those from the American Board of Internal Medicine in 1990 and the American Board of Infectious Diseases in 1992 and the American Certification of Infection Control. He has received Fellowships of the Royal College of Physicians and Surgeons of Canada in Internal Medicine (1991) and Infectious Diseases (1992). He is a fellow of the American College of Physicians (1993), of the Infectious Diseases Society of America (1997), of the Society of Healthcare Epidemiology of America (2000), and Fellow of the Royal College of Edinburgh in 2011 and London 2012