1. WHO (online 20 November 2007) Global HIV prevalence has levelled off. [ http://www.who.int/mediacentre/news/releases/2007/pr61/en/ ]
2. Buvé A et al. (2002) The spread and effect of HIV-1 infection in sub-Saharan Africa. Lancet 359: 2011–2017
3. HIV and AIDS in Africa [ http://www.avert.org/aafrica.htm ]
4. UNAIDS (online 20 November 2007) 2007 AIDS epidemic update. [ http://www.unaids.org/en/KnowledgeCentre/HIVData/EpiUpdate/EpiUpdArchive/2007/ ]
5. UNAIDS/WHO (2006) AIDS epidemic update: December 2006. [ http://data.unaids.org/pub/EpiReport/2006/ ]