School of Medicine


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  • Cybele A. Renault, MD, DTM&H, FIDSA

    Cybele A. Renault, MD, DTM&H, FIDSA

    Clinical Associate Professor, Medicine - Infectious Diseases

    BioDr. Renault has devoted her career to caring for vulnerable patient populations, both domestically and overseas. She completed her medical school and residency training at the University of Chicago, caring for underserved patients on Chicago's South Side, followed by a Chief Resident year at John H. Stroger, Jr. Hospital of Cook County, the public hospital serving the uninsured in Chicago. She began her career in global health as an Infectious Diseases fellow at Stanford, validating low-cost HIV diagnostics in Burkina Faso, and providing clinical service and teaching in India and Zimbabwe as a fellow, and later in Thailand, Uganda, Rwanda and Kenya as one of our Infectious Diseases faculty. Her clinical work is focused on caring for our veteran population, working to empower veterans to engage in their care, often in the setting of significant mental illness.

    Dr. Renault is most passionate about medical education and program development to combat global antimicrobial resistance through antimicrobial stewardship, to create opportunities for the Internal Medicine residents centering on caring for vulnerable patient populations, and to develop impactful and sustainable programs in collaboration with our low- and middle-income partners for our Center for Innovation in Global Health. She served as Associate Program Director for the Internal Medicine Residency Program for 4 years prior to transitioning to her current role as Program Lead for Global Health, for which she leads the Global Health Track for the Internal Medicine residency program and develops global health initiatives for the Department of Medicine. She co-founded and has been director of the Stanford 2-week intensive global health course since its inception in 2012, she has structured trainee and faculty rotations based on evolving needs of our partner sites in Uganda, Rwanda, Zimbabwe, and Sri Lanka, she is the faculty lead for the ID/antimicrobial stewardship partnership between Stanford and Moi Teaching and Referral Hospital in Eldoret, Kenya through the AMPATH Consortium, and she is leading Stanford's Internal Medicine virtual case-based education initiative to support our newest medical school partner in Negele Arsi, Ethiopia.

    Dr. Renault strives to augment Stanford's contributions and support for underserved patient populations in the United States. She established resident rotations in Shiprock, New Mexico and Chinle, Arizona through the Indian Health Service, and she is Faculty Advisor for the Internal Medicine Health Equity, Advocacy and Research concentration in the residency program. She also aspires to improve resources for women physicians. In 2016, Dr. Renault established the GME Women in Medicine Leadership Council, with the intention of creating community and encouraging conversations about professional and personal life decisions as women in the field of medicine. She is passionate about mentoring through sharing personal experiences, creating an environment that encourages reflection, and building skills to address challenges unique to women in medicine.

    In 2022, in recognition of her passion for medical education and her success in program development, Dr. Renault was asked to join the leadership at Palo Alto Veterans Health Care System as Deputy Associate Chief of Staff for Education. In this role, she works with rotation directors to optimize their respective rotations to offer robust educational opportunities for trainees across specialties who are rotating at the Palo Alto VA.

  • Zachary T Renfro

    Zachary T Renfro

    MD Student with Scholarly Concentration in Clinical Research / Immunology, expected graduation Spring 2026
    Masters Student in Epidemiology and Clinical Research, admitted Autumn 2023

    BioZachary studied biology at the University of Arkansas where he researched the impact of temperature on macrophage cytokine production across animal species as well as the neural basis of saccadic mislocalization. After graduation, he worked at the Arkansas Department of Health where he developed and implemented Arkansas' first plan to eliminate tuberculosis. Additionally he researched the contribution of epigenetic regulation on the susceptibility, development, and maintenance of chronic pain at the University of Arkansas for Medical Sciences and participated in the front line response to the COVID-19 pandemic.

    At Stanford, he is enrolled in the MD and MS in epidemiology and clinical research programs. His current research interests include emerging infectious diseases, immunological response to infection, and the impact of climate change on infectious disease.