Botswana, like many nations in southern Africa, suffers from a high AIDS infection rates, estimated in a 2002 UN report to be 38.8% for adults. This could be an exaggeration as the UN and other reputable international institutions wrongly estimated 20-25% HIV infection rates in neighboring South Africa up until 2002. These estimates were revised to 11% after the publication of the 2002 Nelson Mandela study of HIV/AIDS prevalence in South Africa . The numbers quoted here about the demographic impact of AIDS in Botswana (such as negative population growth) should be approached with this qualification in mind. Demographic data from the 2001 Botswana census are included for comparison with 2006 CIA estimates.