AIR FORCE HEALTH STUDY
To address concerns among Vietnam War veterans about the consequences of exposure to Agent Orange and its
contaminant 2,3,7,8-tetrachlorodibenzo-p-dioxin (dioxin), Congress in late 1978 directed the Air Force to
begin planning the Air Force Health Study to evaluate the health, survival and
reproductive outcomes of veterans of Operation Ranch Hand, the unit responsible for the aerial spraying
of herbicides in Vietnam from 1962 to 1971. The study protocol was written and approved during the period
June 1979 through January 1982. The study seeks to determine whether Ranch Hand veterans have experienced adverse
health and whether those effects, if they exist, can be attributed to exposure to herbicides or dioxin.
Ranch Hand veterans were exposed to herbicides during flight operations and maintenance of the aircraft and
spray equipment. A comparison group of other Air Force veterans involved in C-130 aircraft missions in Southeast
Asia during the same period that the Ranch Hand unit was active was included. Comparison veterans were not
involved with spraying herbicides. The study includes periodic analyses of post-service mortality, physical
examinations, in-person interviews, medical record retrievals, and psychological testing. Physical examinations were
administered in 1982, 1985, 1987, 1992, 1997 and 2002.
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This page was last updated Sept 2004