It revealed that LDH, ALB, TP and CRP were correlated with whether nucleic acid turned negative within 14 days, AST, LDH, ALB, CRP and PCT were correlated with severity of COVID-19, and ALB and CRP was correlated with hospital stay > 31days or not (P < 0.05) (Table 3). The gene discussed is ALB; the disease is COVID-19.