Compared with healthy controls, COVID-19 patients had higher monocyte counts (p = 0.00014), lower total lymphocyte counts (p = 0.0017), lower albumin concentrations (p = 0.00015), lower TBIL (p = 0.00014), lower DBIL (p = 0.0089), and the rest showed no significant difference. Here, ALB is linked to COVID-19.