disease acquired immunodeficiency syndrome A Human immunodeficiency virus infectious disease that results_in reduction in the numbers of CD4-bearing helper T cells below 200 per µL of blood or 14% of all lymphocytes thereby rendering the subject highly vulnerable to life-threatening infections and cancers, has_material_basis_in Human immunodeficiency virus 1 or has_material_basis_in Human immunodeficiency virus 2, which are transmitted_by sexual contact, transmitted_by transfer of blood, semen, vaginal fluid, pre-ejaculate, or breast milk, transmitted_by congenital method, and transmitted_by contaminated needles. Opportunistic infections are common in people with AIDS. AIDS DOID:635 EFO:0000765 ICD10CM:B20 MSH:D000163 NCI:C2851 OMIM:609423 SNOMEDCT_US_2015_03_01:186705005 SNOMEDCT_US_2015_03_01:186715004 SNOMEDCT_US_2015_03_01:234644008 SNOMEDCT_US_2015_03_01:266201009 SNOMEDCT_US_2015_03_01:62479008 UMLS_CUI:C0001175 acquired Immune deficiency acquired immune deficiency syndrome disease_ontology