CRP and susceptibility to pneumonia measurement: In the pneumonia group, lower Plt (167*103/μl [133–215*103] vs. 185*103/μl [156–235*103], P = 0.027), higher LDH (221 U/L [199–254] vs. 189 U/L [170–207], P < 0.001), higher CRP (3.13 mg/dL [0.83–6.33] vs. 0.72 mg/dL [0.22–1.83], P < 0.001), higher ferritin (274 ng/mL [172–578] vs. 134 ng/mL [71–240], P < 0.001), higher D-dimer (0.7 μg/mL [0.5–1.5] vs. 0.5 μg/mL [0.3–1.1], P = 0.012) and higher AST (31.0 U/L [22.0–36.0] vs. 23.0 U/L [18.0–33.5], P = 0.006) were found compared to the mild group.