Ricky N. Bluthenthal is the Associate Dean for Social Justice and Professor in the Department of Preventive Medicine and the Institute for Prevention Research at the Keck School of Medicine, University of Southern California. He received a BA in History and Sociology from the University of California Santa Cruz and a PhD in sociology from the University of California Berkeley. His research has established the effectiveness of syringe exchange programs, tested novel interventions and strategies to reduce HIV risk and improve HIV testing among injection drug users and men who has sex with men, documented how community conditions contribute to health disparities, and examined health policy implementation. His current studies include an exploratory, mixed-method study on people who initiated drug injection in their thirties, a community-based participatory research project to reduce multiple health risk among Latinos, and a randomized controlled trial to test the efficacy of a single session intervention to reduce injection initiation risk behaviors among established people who inject drugs. Dr. Bluthenthal has authored or co-authored over 125 articles in peer-reviewed scientific journals such as the American Journal of Public Health, Social Science and Medicine, The Lancet, Addiction, and Alcoholism: Clinical and Experimental Research among others.