The AUROC and precision-recall curves of the classifiers constructed with the RFC, LR classifier, and GBC algorithms from the representative 7-CLI combination (ie, PCT, albumin to globulin ratio [AGR], uric acid, neutrophil count, basophil count, RBC MCV, and MCHC) showed very high performance and precision in COVID-19 prediction; their AUROCs were 1.0, 0.97, and 0.96, respectively (see Figure 2, A), and their average precision values were 1.0, 0.97, and 0.98, respectively (Figure 2, B). Here, ALB is linked to COVID-19.