title: HIV-2 transmission: implications for spread of HIV-1.
authors.forename: T R
authors.initials: TR
authors.lastname: O'Brien
mesh_terms: D015658:HIV Infections / Q000635:transmission*; D015497:HIV-1 / Q000472:pathogenicity*; D015498:HIV-2 / Q000472:pathogenicity*; D006801:Humans