According to the ROC curve of IL-7 analysis, the cutoff value for IL-7 was 1.94 pg/mL, with a sensitivity of 74.23% and a specificity of 75.34% for sepsis/septic shock, and the area under the curve (AUC) was 0.8547 (p < 0.0001), 95% CI 0.79–0.90. The gene discussed is IL7; the disease is Sepsis.