CRP and susceptibility to pneumonia measurement: We also found a higher erythrocyte sedimentation rate (mm per hour) (44.0 [IQR, 22.0–67.3]) and C-reactive protein (CRP) (U per L) (8.6 [IQR, 2.8–24.0]) in symptomatic with pneumonia group than in the other groups, whereas the asymptomatic without pneumonia group had a lower level of CRP (U per L) (1.7 [IQR, 0.3–3.0]) than the other groups (Table 2).