These 2-y survivalprobabilities are remarkably similar to those we computed for individuals with afirst CD4 cell count of 50 cells/μl who initiated treatment 15 d and 60 dafter TB treatment initiation: 0.82 (95% CI: [0.76, 0.89]) and 0.76(95% CI: [0.68, 0.83]), respectively. This evidence concerns the gene CD4 and tuberculosis.