tested a combination of TRAIL, CRP, and plasma interferon-gamma protein-10 (IP-10) to differentiate between bacterial and viral infections in children, and they found that this assay was more effective than PCT in identifying bacterial and viral cases, with a sensitivity of 86.7% and a specificity of 91.1% (van Houten et al., 2017). The gene discussed is CRP; the disease is viral infectious disease.