Epidemiology is the study of health in populations to understand the causes and patterns of health and illness. The Epidemiology Program, a research division of VA’s Office of Public Health, conducts research studies and surveillance (the collection and analysis of data) on the health of Veterans.
Operation Enduring Freedom (OEF), Operation Iraqi Freedom (OIF) and Operation New Dawn (OND)
VA is collecting data on the military and life experiences of up to 12,000 twins who separated from military service after 2001. The Gulf-Era Twin Registry will help researchers identify Veterans who are eligible for future research studies.
View more research on Gulf War Veterans' illnesses.
View more research on Agent Orange health effects.
The mortality follow-up study, Cancer Mortality among Military Personnel at U.S. Nuclear Weapons Tests will assess the risk of cancer among 120,000 U.S. military personnel who participated in atmospheric weapons testing at the Nevada Test Site and the Pacific Proving Grounds between 1946 and 1958.
VA continues to study the long-term health effects of Project 112/SHAD, biological and chemical warfare tests from 1962 to 1974.
VA's War Related Illness and Injury Study Centers focus on research for deployment-related health conditions.