Julia Marcus

Julia Marcus, PhD, MPH is an infectious disease epidemiologist and Associate Professor in the Department of Population Medicine at Harvard Medical School and Harvard Pilgrim Health Care Institute, and Adjunct Faculty at The Fenway Institute. Her research focuses on improving the implementation of preexposure prophylaxis (PrEP) to prevent new HIV infections and promote sexual health in the U.S. Her studies have leveraged data from electronic health records (EHRs) to identify patients who may benefit from PrEP, characterize PrEP uptake and continuation, and document clinical outcomes among PrEP users in real-world healthcare settings. She is leading multiple implementation projects to evaluate whether EHR-based predictive analytics and clinical decision support can improve PrEP prescribing in diverse healthcare settings.

In addition to her research, Dr. Marcus has written popular science essays for the public, including a series of articles in The Atlantic on health communication during the coronavirus pandemic with lessons learned from the HIV epidemic.

Dr. Marcus received her doctoral degree in epidemiology from the University of California, Berkeley, and completed a postdoctoral fellowship at the Kaiser Permanente Division of Research.




Associate Professor

Work Phone
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Harvard Medical School
Department of Population Medicine
401 Park Drive, Suite 401 East
Boston, MA 02215