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IN COMPLIANCE with the Food and Drug Administration's recommendation, all blood banks in the United States on June 1 began testing donated blood for the human immunodeficiency virus type 2 (HIV-2), a rare strain of the virus that causes acquired immunodeficiency syndrome. This latest requirement has lengthened the gauntlet of tests donated blood must be run through before it can be used in transfusions. According to the American Association of Blood Banks, eight screening tests are now used, including tests for the syphilis spirochete (Treponema pallidum), HIV-1, HIV-2, human T-cell lymphotrophic virus type 1, hepatitis B virus, hepatitis C virus, and two surrogate tests for non-A, non-B hepatitis viruses. Prior to 1985, blood was screened only forT pallidumand hepatitis B virus (Dane particle). Not Without Hazards Indisputably, blood transfusions save the lives of many thousands of patients each year. Nevertheless, there is a growing recognition of the health
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