ALB and COVID-19: The average levels of the TP, ALB and A/G in COVID-19 patients, which was significantly lower than the control group within 14 days after discharge, elevated gradually; the average levels of the ALT, GGT and ALP, which was significantly higher in patients than the control group within 14 days after discharge, decreased gradually (P<0.05, and P<0.01, Table 6).