title: As AIDS drugs fail thousands, "salvage" is key.
mesh_terms: D019380:Anti-HIV Agents / Q000627:therapeutic use*; D015658:HIV Infections / Q000188:drug therapy*; D006801:Humans; D016879:Salvage Therapy; D017211:Treatment Failure; D014481:United States
chemical_list: D019380:Anti-HIV Agents