CD4 and sexually transmitted disease: Nine years after final stop the number of CD4 and CD8 cells and CD4/CD8 ratio were not different between groups: CD4 cells = 769.5/mm3 for the STI group and 844.5/mm3 for the IL-2 group (p = 1), CD4 percentage = 38.88 for the STI group and 38.7 for the IL-2 group (p = 0.394) and CD4/CD8 ratio = 1.20 for the STI group and 0.95 for the IL-2 group (p = 0.522).