Dr. Paul E. Sax is the Bruce A. Beal and Robert L. Beal Endowed Chair in Infectious Diseases at Brigham and Women's Hospital and Professor of Medicine at Harvard Medical School. 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). 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. Dr. Sax assumed the role of Editor-in-Chief of NEJM Clinician in November 2026.