Dr. Paul E. Sax is Clinical Director of the Division of Infectious Diseases at Brigham and Women's Hospital and Professor of Medicine at Harvard Medical School, where he holds the Bruce A. Beal and Robert L. Beal Endowed Chair in Infectious Diseases. He received his M.D. from Harvard Medical School and did his residency in internal medicine at the Brigham, then fellowship in infectious diseases at Massachusetts General Hospital.

Dr. Sax is the Editor-in-Chief of Clinical Infectious Diseases, the flagship journal of the Infectious Diseases Society of America (IDSA). In addition, he is a Section Editor of HIV/AIDS in UpToDate. An internationally recognized clinician and clinical teacher in infectious diseases and HIV, Dr. Sax also has been actively involved in research. Ongoing areas of investigation include clinical trials of antiretroviral therapies, cost-effectiveness of strategies for HIV management, toxicity of antiretroviral therapy, and treatment and prevention of Covid-19.