GPT and COVID-19: According to the guidelines established in the MSD (https://www.msdmanuals.com/professional/SearchResults?query=Normal+laboratory+values (accessed on 6 August 2021)) for normal laboratory values, the COVID-19 patients presented elevated levels of ferritin (463.5 ng/dL) and LDH (276.6 U/L), and a moderate increase in ALT (38 U/L), and AST (38 U/L) enzymes.