HIV-negative AIDS cases being studied.
Haddy
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D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D003430:Cross-Sectional Studies; D006679:HIV Seropositivity / Q000453:epidemiology* / Q000276:immunology; D006801:Humans; D015994:Incidence; D007958:Leukocyte Count; D011159:Population Surveillance; D014903:West Virginia / Q000453:epidemiology