CRP and viral infectious disease: The combination of SeptiCyteTM TRIAGE with our published signature for viral infections (SeptiCyteTM VIRUS) discriminated bacterial and viral infections in febrile ED patients, with a receiver operating characteristic area under the curve of 0.95 (95% confidence interval 0.90–1), compared to 0.79 (0.68–0.91) for WCC and 0.73 (0.61–0.86) for CRP.