Less than 10% of HIV-positive individuals in South Africa will be eligible to receive antiretroviral therapy if World Health Organisation guidelines which mandate the use of anti-HIV therapy in patients with a CD4 cell count below 200 cells/mm3 are followed, according to a French-funded study published in the May 1st edition of the Journal of Acquired Immune Deficiency Syndromes. The study also found that this would have only a limited impact on the spread of HIV.