title: Origin and spread of AIDS.
authors.forename: S K
authors.initials: SK
authors.lastname: Owusu
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000453:epidemiology / Q000209:etiology* / Q000635:transmission; D000349:Africa / Q000453:epidemiology; D000818:Animals; D015658:HIV Infections / Q000382:microbiology / Q000635:transmission; D015498:HIV-2 / Q000302:isolation & purification; D006801:Humans; D012725:Sexual Behavior; D016097:Simian Acquired Immunodeficiency Syndrome / Q000635:transmission