Inclusion Criteria:  consecutive, adult, admitted to an internal medicine ward with internistic diagnosis, together with COVID-19, and elevated liver enzymes (any of AST, ALT, GGT, ALP), provided written informed consent  Exclusion Criteria:  too sick - terminal illness (no potential for recovery); critical condition on admission requiring immediate tracheal intubation; or any extra-pulmonary organ failure; completely vaccinated against COVID19.