GPT and COVID-19: Jin et al. in their retrospective epidemiological study evaluating clinical and virologic characteristics of 74 COVID-19 patients manifesting with gastrointestinal symptoms (nausea, vomiting, diarrhea) reported increased AST, but not ALT levels, which were significantly higher in patients with COVID-19 with gastrointestinal (GI) symptoms than in those without GI symptoms (29.35 vs. 24.4, p = 0.02).