CD4 and tuberculosis: Amongst the remaining 149/227 (66%) of participants who reported no WHO-tool symptoms at attendance for Xpert result, sputum was collected for repeat Xpert due toa priori high risk of active TB because newly-diagnosed HIV-positive (42); pre-ART with CD4 count <200 cells/mm3 (42); CD4 count <100 cells/mm3 (33); on ART with CD4 count 100–199 cells/mm3 (17); BMI <18.5 kg/m2 or weight loss ≥10%, (15).