Furthermore, an elevated liver function is common in patients with COVID-19, with more significant increases in alanine aminotransferase (ALT) and aspartate aminotransferase (AST) elevations in severe COVID-19 than in mild/moderate COVID-19.5 Thus there is a close relationship between digestive system injury and SARS-CoV-2 infection. This evidence concerns the gene GPT and COVID-19.