Markella V. Zanni, MD, is Associate Professor of Medicine at Harvard Medical School and an Endocrinologist in the Department of Medicine at Massachusetts General Hospital. Dr. Zanni earned her medical degree from Harvard Medical School as a Paul and Daisy Soros Fellow. She then completed her Internal Medicine Residency and Chief Resident year at Brigham and Women's Hospital/Harvard Medical School and her Endocrinology Fellowship at Massachusetts General Hospital/Harvard Medical School.

Dr. Zanni's research centers on immune and hormonal mechanisms of atherosclerotic cardiovascular disease and heart failure among people living with HIV, particularly women. She has served as Principal Investigator on grants funded by the National Institutes of Health, the Harvard University Center for AIDS Research, and Industry, and has published widely in her field.

Dr. Zanni is Vice-Chair of the REPRIEVE protocol, Co-Chair of the Protocol Writing and Implementation Committee, and Co-Chair of the Publications Committee.