title: HIV's origins traced to 1930s.
authors.forename: J
authors.initials: J
authors.lastname: Stephenson
mesh_terms: D000349:Africa; D000818:Animals; D019143:Evolution, Molecular; D014644:Genetic Variation; D015658:HIV Infections / Q000266:history*; D015497:HIV-1 / Q000235:genetics; D049673:History, 20th Century; D006801:Humans; D008962:Models, Theoretical; D002679:Pan troglodytes / Q000821:virology