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Dr. Natasha Martin is an infectious disease economic modeler who develops dynamic transmission models to evaluate the impact and cost-effectiveness of public health interventions. She is currently a Professor in the Division of Infectious Diseases and Global Public Health at the University of California San Diego and holds an honorary senior lecturer position at the University of Bristol. She directs the NIDA-funded T32 program in Substance Use, HIV, and related syndemics along with MPI Steffanie Strathdee, which trains pre and postdoctoral fellows. She is the MPI on the UC GloCal Health Fellowship, which provides one year of funding to conduct global health research abroad (https://ucghi.universityofcalifornia.edu/fellowships/glocal-health-fellowship). Finally, she is co-director of the Biostatistics and Modeling Core of the University of California San Diego Center for AIDS Research (UCSD CFAR). Her primary research has focused on modeling the impact and cost-effectiveness of interventions to prevent HIV, hepatitis C virus, and overdose among people who use drugs. She is the principal investigator (PI) of a NIAID/NIDA-funded R01 optimizing HIV and HCV prevention portfolios among people who inject drugs in 108 countries, MPI on a NIMH funded R01 on using molecular epidemiology and modeling to optimize HIV resource allocation in Miami-Dade county, and MPI a CDC-funded outbreak analytics and modeling center. Her modeling work informed the WHO guidelines “When to start ART in people living with HIV (2013)”, “Hepatitis C testing, care, and treatment (2013)” and the WHO “Global Health Sector Strategy on Viral Hepatitis 2016-2021”. She is the Vice President of the International Network on Health and Hepatitis in Substance Users (INHSU) and an associate editor of the journal Addiction.