(1) Patients with pneumonia due to other etiology.(2) Critically severe COVID19 ARDS cases Requiring invasive mechanical ventilation at screening,(3) Patients who have severe concomitant illness that affects survival or course of the disease, including uncontrolled malignant tumor, HIV, blood dyscrasia, active bleeding or patients with shock/or multiple organ failure at screening.(4) Pregnant or lactating females.(5) Hypersensitivity or contraindication to any of the experimental drugs used in the study (Prolonged QT syndrome, G6PD deficiency, psoriasis, retinal damage or others). . (6) Patients with decompensated liver cirrhosis or abnormal liver enzyme tests above three times the upper limit values (alanine aminotransferase (ALT) and aspartate aminotransferase (AST),(7) Renal dysfunction (estimated glomerular filtration rate [eGFR] <30 mL/min/1.73m2),

(1) Patients with pneumonia due to other etiology.(2) Critically severe COVID19 ARDS cases Requiring invasive mechanical ventilation at screening,(3) Patients who have severe concomitant illness that affects survival or course of the disease, including uncontrolled malignant tumor, HIV, blood dyscrasia, active bleeding or patients with shock/or multiple organ failure at screening.(4) Pregnant or lactating females.(5) Hypersensitivity or contraindication to any of the experimental drugs used in the study (Prolonged QT syndrome, G6PD deficiency, psoriasis, retinal damage or others). . (6) Patients with decompensated liver cirrhosis or abnormal liver enzyme tests above three times the upper limit values (alanine aminotransferase (ALT) and aspartate aminotransferase (AST),(7) Renal dysfunction (estimated glomerular filtration rate [eGFR] <30 mL/min/1.73m2),