ROC analyses showed that CRP had good accuracy in distinguishing cases with confirmed bacterial infection from RSV pneumonia cases (AUC = 0.87, Figure 2); the CRP cut-point that produced optimal differentiation was 37.1 mg/L with a corresponding sensitivity of 77% (95% CI, 69%–84%) and specificity of 82% (95% CI, 78%–85%). The gene discussed is CRP; the disease is bacterial infectious disease.