title: Human immunodeficiency virus: an epidemic without precedent.
authors.affiliation: Pediatric AIDS Research Institute, University of California, San Francisco, California, USA. Ammanndoc@aol.com
authors.forename: A J
authors.initials: AJ
authors.lastname: Ammann
mesh_terms: D014943:Global Health; D006678:HIV / Q000235:genetics / Q000472:pathogenicity; D015658:HIV Infections / Q000453:epidemiology* / Q000517:prevention & control*; D006801:Humans; D015994:Incidence; D009154:Mutation