Gregory C. Gray MD, MPH, FIDSA is an infectious disease epidemiologist and Professor at the University of Texas Medical Branch in Galveston, Texas. He is affiliated with three Departments: Internal Medicine (Infectious Diseases), Microbiology and Immunology, and Preventive Medicine & Population Health.

Professor Gray received his medical degree, at the University of Alabama at Birmingham, School of Medicine, Birmingham, Alabama and his MPH degree from Johns Hopkins School of Hygiene & Public Health, Baltimore, Maryland. He received residency training at Walter Reed Army Institute of Research in Washington, District of Columbia. His medical boards are in Preventive Medicine and Public Health.

Dr. Gray has conducted diverse epidemiological studies of infectious diseases for 25 years in 5 continents. He has authored more than 360 peer-reviewed manuscripts and book chapters. Much of his work has involved identifying risk factors for occupational diseases, particularly for respiratory virus infections. He has studied numerous occupational groups including farmers, animal breeders, veterinarians, military personnel, turkey workers, poultry workers, horse workers, hunters, and pig workers. A strong supporter for the One Health approach, he has won multiple One Health research and training grants, helped to established centers of One Health (USA, Romania, China) and developed four graduate programs in One Health (PhD, MHS, and certificates).

Professor Gray is a Fellow in the Infectious Diseases Society and a member of the Council on Foreign Relations.


Degree/Training CompletedYearName & Location
B.S.1977U.S. Naval Academy
M.D.1983University of Alabama at Birmingham, School of Medicine
MPH1987John Hopkins School of Hygiene & Public Health
Residency1988Preventive Medicine & Public Health, Walter Reed Army Institute of Research