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Previous Volume 320:1581-1585 June 15, 1989 Number 24 Next

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Abstract

Direct measurement of the incidence of infection with the human immunodeficiency virus (HIV)--the rate of new HIV infection--is vital if we are to understand better the dynamics of the current epidemic of HIV infection. Because soldiers are periodically and routinely screened for antibody to HIV, it is possible to measure the incidence of HIV infection directly in this large, demographically well-characterized population of young adults. To determine the incidence of HIV infection in this population, we examined test results reported by the U.S. Army's routine antibody-screening programs. During the first two years of the screening programs, the observed incidence of HIV infection was approximately 0.77 per 1000 persons per year. This rate was higher than expected on the basis of previously published estimates of seroprevalence in the Army (approximately 1.50 per 1000). On the basis of this annual incidence, and assuming it to be stable, we estimate that approximately 600 soldiers will become infected with HIV each year. The observed rate in the Army may be lower than the incidence of HIV infection in the corresponding demographic groups within the general U.S. population.

Source Information

Division of Preventive Medicine, Walter Reed Army Institute of Research, Washington, D.C. 20307-5100.

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