Hence, the triple host-protein ImmunoXpert assay, combining the virally induced proteins tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) and IFN-γ-induced protein 10 (IP-10) with the bacterially induced protein CRP, showed around 90% sensitivity and specificity in diagnosing a bacterial infection from a viral infection in paediatric patients [11,22,25,27,28,29]. Here, CXCL10 is linked to viral infectious disease.