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Public Health

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Epidemiology Research Studies

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 Patient Care Services, conducts epidemiology research studies and surveillance (the collection and analysis of data) on the health of Veterans.

OEF/OIF/OND Veterans

Operation Enduring Freedom (OEF), Operation Iraqi Freedom (OIF) and Operation New Dawn (OND)

Gulf-Era Twin Registry

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.

Gulf War Era Veterans with 1990-1991 service

View more research on Gulf War Veterans' illnesses.

Vietnam Era Veterans

  • Vietnam Era Health Retrospective Observational Study (VE-HEROeS) This study will assess the current health and well-being of Vietnam era Veterans and compare their health to similarly aged U.S. residents who never served in the military.
  • Army Chemical Corps Vietnam-Era Veterans Health Study
    Researchers are studying approximately 4,000 Veterans who served in the U.S. Army Chemical Corps sometime between 1965-1973 to determine if high blood pressure (hypertension) and chronic obstructive pulmonary disease (COPD) are related to Agent Orange exposure during Vietnam.
  • Health of Vietnam Era Women's Study
    This is the most comprehensive study to date of the mental and physical health of women Vietnam Veterans. The study will be used to shape future research and to plan for appropriate services for women Veterans and the aging Veteran population.

View more research on Agent Orange health effects.

Project 112/SHAD Veterans

VA continues to study the long-term health effects of Project 112/SHAD, biological and chemical warfare tests from 1962 to 1974.

War Related Illness and Injury Research

VA's The War Related Illness and Injury Study Center focuses on research for deployment-related health conditions.