ALB and viral infectious disease: Previously, we reported that the albumin platelet product (APP), a simple byproduct of the serum albumin level and platelet count, indicates the staging of liver fibrosis, the stratification of HCC-free survival, and the overall survival of patients with chronic liver diseases, including hepatitis C and B viral infections (HCV and HBV, respectively), autoimmune hepatitis, and primary biliary cholangitis5.