drug – expression system F fat redistribution – FDA FDC – floaters – follicle – follicular dendritic cells (FDCs) – Food and Drug Administration (United States) functional antibody – fungus – fusin – fusion inhibitor – fusion mechanism – fusion peptide G GAG – gamma globulin – gamma interferon – ganglion – GART – gastrointestinal (GI) – gene – gene therapy – genetic engineering – genital ulcer disease – genital warts – genitourinary tract – genome – genotypic assay – germinal centers – giardiasis – globulins – glycoprotein – gonorrhea – gp120 (gp120) – gp160 (gp160) – gp41 (gp41) – granulocyte – granulocyte macrophage-colony stimulating factor (GM-CSF) – granulocyte-colony stimulating factor (G-CSF) – granulocytopenia H HAART – hairy leukoplakia – half-life – HAM/TSP – Health Care Financing Administration (HCFA) – Health Resources and Services Administration (HRSA) – HELLP syndrome – helper T cells – helper/suppressor ratio (of T cells) – hematocrit – hematotoxic – hemoglobin – hemolysis – hemophilia – hepatic – hepatic steatosis – hepatitis – hepatitis C and HIV coinfection – hepatomegaly – herpes simplex virus 1 (HSV-1) – herpes simplex virus 2 (HSV-2) – herpes varicella zoster virus (VZV) – herpes viruses – highly active antiretroviral therapy (HAART) – histocompatibility testing – histoplasmosis – HIV disease – HIV prevention trials network (HPTN) – HIV set point – HIV vaccine trials network (HVTN) – HIV-1 – HIV-2 – HIV-associated dementia – HIV-related tuberculosis – HLA – Hodgkin's disease – holistic medicine – homology (biology) – hormone – host – host factors – HPTN – HPV – HRSA – HTLV-I – HTLV-I-associated myelopathy/tropical spastic paraparesis (HAM/TSP) – HTLV-II – human growth hormone (HGH) – human immunodeficiency virus type 1 (HIV-1) – human immunodeficiency virus type 2 (HIV-2) – human leukocyte antigens (HLA) – human papilloma virus (HPV) – human T cell lymphotropic virus type I (HTLV-I) – human T cell lymphotropic virus type II (HTLV-II) – humoral immunity – HVTN – hydroxyurea – hypergammaglobulinemia – hyperglycemia – hyperlipidemia – hyperplasia – hyperthermia – hypogonadism – hypothesis – hypoxia I idiopathic – idiopathic thrombocytopenia purpura – IHS – immune complex – immune deficiency/immunodeficiency – immune response – immune system – immune thrombocytopenic purpura – immunity – immunization – immunocompetent – immunocompromised – immunodeficiency – immunogen – immunogenicity – immunoglobulin (Ig) – immunoglobulin A (IgA) – immunoglobulin D (IGD) – immunoglobulin E (IGE) – immunoglobulin G (IGG) – immunoglobulin M (IGM)