Diagnosis of COVID-19 based on either ground glass appearance in chest CT scan or positive RT-PCR test for COVID-19 Requiring hospitalization because of: Patient's oxygen saturation less than 93% OR Requiring hospitalization because of: GCS score less than 15 OR Requiring hospitalization because of: systolic blood pressure less than 100 or 30 mmHg decrease in systolic blood pressure from the level prior to current illness OR Requiring hospitalization because of: renal failure (creatinine 1.5 times the previous measurement in the last 7 days OR Requiring hospitalization because of: liver failure (AST and ALT 3 times upper limit of normal) Patient's age between 16 and 100 years Signed informed consent form.

Diagnosis of COVID-19 based on either ground glass appearance in chest CT scan or positive RT-PCR test for COVID-19 Requiring hospitalization because of: Patient's oxygen saturation less than 93% OR Requiring hospitalization because of: GCS score less than 15 OR Requiring hospitalization because of: systolic blood pressure less than 100 or 30 mmHg decrease in systolic blood pressure from the level prior to current illness OR Requiring hospitalization because of: renal failure (creatinine 1.5 times the previous measurement in the last 7 days OR Requiring hospitalization because of: liver failure (AST and ALT 3 times upper limit of normal) Patient's age between 16 and 100 years Signed informed consent form.