1. patients who participated in other clinical trials related to covid-19 2. patients who were administered drugs directly to covid-19 24hours prior to the start of the study. 3. patients who need oxygen supply or breathing device (non-invasive mechanical ventilation(via mask)), mechanical ventilator requirement (via endotracheal tube or tracheostomy tube, ecmo requirement) at the time of screening or baseline 4. patients whose ast or alt has increased by more than 5 times the normal lab value.

1. patients who participated in other clinical trials related to covid-19 2. patients who were administered drugs directly to covid-19 24hours prior to the start of the study. 3. patients who need oxygen supply or breathing device (non-invasive mechanical ventilation(via mask)), mechanical ventilator requirement (via endotracheal tube or tracheostomy tube, ecmo requirement) at the time of screening or baseline 4. patients whose ast or alt has increased by more than 5 times the normal lab value.

patients who participated in other clinical trials related to covid-19 patients who were administered drugs directly to covid-19 24hours prior to the start of the study. patients who need oxygen supply or breathing device (non-invasive mechanical ventilation(via mask)), mechanical ventilator requirement (via endotracheal tube or tracheostomy tube, ecmo requirement) at the time of screening or baseline patients whose ast or alt has increased by more than 5 times the normal lab value.

patients who participated in other clinical trials related to covid-19 patients who were administered drugs directly to covid-19 24hours prior to the start of the study. patients who need oxygen supply or breathing device (non-invasive mechanical ventilation(via mask)), mechanical ventilator requirement (via endotracheal tube or tracheostomy tube, ecmo requirement) at the time of screening or baseline patients whose ast or alt has increased by more than 5 times the normal lab value.

1. patients who participated in other clinical trials related to covid-19 2. patients who were administered drugs directly to covid-19 24hours prior to the start of the study. 3. patients who need oxygen supply or breathing device (non-invasive mechanical ventilation(via mask)), mechanical ventilator requirement (via endotracheal tube or tracheostomy tube, ecmo requirement) at the time of screening or baseline 4. patients whose ast or alt has increased by more than 5 times the normal lab value.

1. patients who participated in other clinical trials related to covid-19 2. patients who were administered drugs directly to covid-19 24hours prior to the start of the study. 3. patients who need oxygen supply or breathing device (non-invasive mechanical ventilation(via mask)), mechanical ventilator requirement (via endotracheal tube or tracheostomy tube, ecmo requirement) at the time of screening or baseline 4. patients whose ast or alt has increased by more than 5 times the normal lab value.