Aaron Tobian, MD, PhD, is a Professor of Pathology, Medicine and Epidemiology at The Johns Hopkins University School of Medicine and Bloomberg School of Public Health.  Over the past 25 years, Dr. Tobian has lived or worked in five developing countries.  

Dr. Tobian has collaborated with the Rakai Health Sciences Program for more than 15 years evaluating the mucosal immunology in tissue permitting HIV-1 acquisition and the synergy between STIs and HIV acquisition.  

He has authored more than 400 peer-reviewed articles in journals including The New England Journal of Medicine, JAMA, Lancet, Clinical Infectious Diseases and Lancet Infectious Diseases.