Dr. Rotstein is also a member of the National Advisory Committee on Immunization of the Public Health Agency of Canada. In addition, he has been elected a fellow of the American College of Physicians and the Infectious Diseases Society of America. He is also a fellow of the European Confederation of Medical Mycology. He functions as a reviewer for several international journals. Dr. Rotstein has published over 190 peer-reviewed papers. His research interests have focused mainly on infections in cancer patients and other immunocompromised hosts as well as fungal infections caused by Candida organisms. He maintains active research interests in immunocompromised hosts.