Out of the 19 true positive samples (above the positivity threshold; Figure 4), 14 (73.7%) would have been rated as positive based on the IFNG mRNA FC result alone (empty diamonds above the horizontal threshold for IFNG positivity; Figure 4), while five (26.3%) would have been missed without the consideration of CXCL10 mRNA FC in the T-Track® TB test evaluation (empty triangles below the horizontal dotted line). Here, IFNG is linked to tuberculosis.