CRP and infection: (1) Infection indicators: Compared with baseline levels, WBC, NEU%, PCT, and CRP decreased significantly in the placebo group after 5-day treatment (10.50 (IQR, 8.73, 16.53) vs.14.92 (IQR, 10.71, 19.55), p = 0.004 for WBC, 82 (IQR, 76.2, 88.4) vs. 88.6 (IQR, 84.1, 93.2), p < 0.001 for NEU%, 1.50 (IQR, 0.85, 6.01) vs. 8.27 (2.33, 19.14), p < 0.001 for PCT, and 68.29 (IQR, 30.7, 125.68) vs. 124.26 (IQR, 63.20, 142.43) p = 0.004 for CRP).