Biochemical Indexes of COVID-19 patients between the control and IFN-κ plus TFF2 Groups. AST(A), ALT(B), TBil(C), and Blood Platelet(D) were detected, and showed a downward trend in the IFN-κ plus TFF2 group (N = 11), compared to the control group (N = 22), while they were covering the normal range value. Specially, the level of ALT and TBil were significantly decreased during the inhalation in the IFN-κ plus TFF2 group.