CRP and pneumonia: By tracing the AUC, it is revealed that some hematological constants—CRP (AUC = 0.779; 95%CI: 0.672–0.886; p = 0.001), AST (AUC = 0.769; 95%CI: 0.668–0.871; p = 0.001), ferritin (AUC = 0.767; 95%CI: 0.657–0.877; p = 0.001), bilirubin (AUC = 0.758; 95%CI: 0.665–0.851; p = 0.001), fibrinogen (AUC = 0.734; 95%CI: 0.605–0.863; p = 0.001), and ALT (AUC = 0.706; 95%CI: 0.595-0.817; p = 0.002)—may be good predictors of pneumonia through SARS CoV-2 (Table 6, Figure 2).