The causative agent of the acquired immunodeficiency syndrome (AIDS) is the human immunodeficiency virus, type 1 (HIV-1). This is a retrovirus of the human T-cell leukemia/lymphoma line. An important feature of HIV spectrum disease, whose terminal stage is AIDS, is that it can have a long asymptomatic phase that may last as long as 10 to 15 years (Munoz, Wang Good, Detels, Ginsberg, Kingsley, Phair, & Polk, 1988). This is followed by the appearance of constitutional signs and symptoms (Kaplan, Wofsky, & Volberding, 1987). Death usually ensures within 2 years (Lemp, Payne, Neal, Temelso, & Rutherford, 1990).
KeywordsMitogen Response Natural Killer Cell Cytotoxicity Speech Stressor Immune Measure Seronegative Group
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