Additionally, serum MMP9 showed significantly decreased activity not only in viral hepatitis (2.99 ± 1.40 ng/mL, p < 0.0001) and viral cirrhosis (2.80 ± 1.36 ng/mL, p < 0.0001) but also in alcoholic hepatitis (2.84 ± 1.09 ng/mL, p < 0.0001) and alcoholic cirrhosis (1.32 ± 1.08 ng/mL, p < 0.0001) when compared to normals. Here, MMP9 is linked to animal viral hepatitis.