Patient with COVID-19 Under 80 y/o age With positive RT-PCR test With bilateral lung parenchyma infiltration Blood oxygen saturation <93% Did not take any medication or hospitalization for COVID-19 Taking any Corticosteroid They have tendency to participate in this study

Patient with COVID-19 Under 80 y/o age With positive RT-PCR test With bilateral lung parenchyma infiltration Blood oxygen saturation <93% Did not take any medication or hospitalization for COVID-19 Taking any Corticosteroid They have tendency to participate in this study