Natasha Martin, DPhil, is an Associate Professor in the Division of Infectious Diseases and Global Public Health at UC San Diego. She is an economic modeler who develops dynamic epidemic models to predict the impact and cost-effectiveness of interventions to prevent HIV, viral hepatitis, and other infections. She has particular research focus on interventions to improve health among substance using populations such as people who inject drugs and men who have sex with men. Her work has informed several World Health Organization guidelines (HIV antiretroviral treatment, Hepatitis C virus testing and treatment, Viral Hepatitis elimination) as well as national and local strategies (U.S. CDC, Scotland, England, Georgia, San Diego, etc).