In addition, while correlation and heatmap analysis demonstrated that the anti-measles VL dIgA response has low correlation and thus is independent from anti-measles IgM (Fig. 3), the diagnostic potential of anti-measles dIgA as determined using AUC did not outperform the commercial anti-measles VL and NP IgM assays due to a small number of high false positives observed in samples of patients with other viral exanthematous infections (Fig. 1; Table 1). Here, CD40LG is linked to measles.