Time course of total CD4 and CD8 T-cell counts after treatment for HD. The total CD4 and CD8 T-cell counts are plotted versus years after completion of treatment for the group of subjects who had been treated for HD up to 5 years before analysis (n = 33). Counts for subjects who were analyzed more than 5 years after completion of treatment are grouped together (n = 23). The distribution of CD4 and CD8 counts for 34 healthy individuals is shown on the right for comparison. The standard least squares fit is shown. Gray lines on the distributions for the groups on the right indicate the medians.