title: Acquired immune deficiency syndrome. A viral disease.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000382:microbiology* / Q000635:transmission; D001803:Blood Transfusion; D017977:Deltaretrovirus / Q000302:isolation & purification*; D006801:Humans; D014771:Virion / Q000302:isolation & purification