Dr. Berthaud is Professor in Medicine, Director of the Division of Infectious Diseases, Founding Executive Director of Meharry Community Wellness Center, AIDS Center of Excellence, and Associate Director of the Clinical Discovery Core of Tennessee Center for AIDS Research. Dr. Berthaud serves as Principal Investigator and Project Director for the NIH-sponsored Meharry HIV Research and Training Facility, Program Director for the HRSA-funded National HIV Residency Pathway Consortium at Meharry Medical College, and Mentor for the NIH-funded Enhancing Virology Training of Underrepresented Minority Students through Summer Research program and the U01-Practice-Based Research Integrating Multidisciplinary Experiences in Dental Schools. In 2005, he played a key role in the creation of the Meharry Center for HIV/AIDS Health Disparities Research. In 2006, he developed and implemented the ongoing PEPFAR program at Hôpital de l’Université d’Etat d’Haiti (HUEH) in Port-au-Prince, Haiti, and in 2017, he spearheaded the growing Meharry PEPFAR program in Zambia. His research focuses on HIV health disparities, HIV care continuum, HIV-associated neurological disorders, and COVID-19. His research had showed the detrimental effects of homelessness on Ending-The-Epidemic of HIV and demonstrated that the alterations in plasma mtDNA content could serve as a biomarker for mitochondrial dysfunction, potentially heralding subsequent neuronal damage in persons with HIV who have achieved viral suppression.