Li and colleagues reported that a single gene (IL‐9 mRNA) can separate children with TB vs. healthy controls with an AUC of 0.92 after ESAT‐6 stimulation,62 while Jenum and colleagues reported that an 8‐gene biomarker signature separated children with TB from asymptomatic siblings in stimulated blood with an AUC of 0.88.104. This evidence concerns the gene IL9 and tuberculosis.