However, when ART uptake was compared across CD4 categories, in 2013 despite guidelines that prescribed universal coverage for all HIV-positive TB patients, a greater proportion of patients with higher CD4 counts did not start ART: in the CD4 count category from 0 to 200 cells/mm3, 17.9% of patients did not start ART, in the category of 201–500 cells/mm3, 22.8% did not start ART and in category > 500 cells/mm3, 36.8% did not start ART. This evidence concerns the gene CD4 and tuberculosis.