Comment on

• Trends and interaction of HIV-1 and HIV-2 in Guinea-Bissau, west Africa: no protection of HIV-2 against HIV-1 infection.

  Norrgren H, Andersson S, Biague AJ, da Silva ZJ, Dias F, Nauclér A, Biberfeld G. Norrgren H, et al. AIDS. 1999 Apr 16;13(6):701-7. doi: 10.1097/00002030-199904160-00011. AIDS. 1999. PMID: 10397565
• Low and stable HIV infection rates in Senegal: natural course of the epidemic or evidence for success of prevention?

  Meda N, Ndoye I, M'Boup S, Wade A, Ndiaye S, Niang C, Sarr F, Diop I, Caraël M. Meda N, et al. AIDS. 1999 Jul 30;13(11):1397-405. doi: 10.1097/00002030-199907300-00018. AIDS. 1999. PMID: 10449294
• Towards a better understanding of the epidemiology of HIV-2.

  Schim van der Loeff MF, Aaby P. Schim van der Loeff MF, et al. AIDS. 1999;13 Suppl A:S69-84. AIDS. 1999. PMID: 10885765 Review. No abstract available.