Clinical severity definitions
respiratory failure, pneumonia, fever
RESPIRATORY FAILURE, PNEUMONIA, MULTIPLE ORGAN FAILURE, SEPTIC SHOCK
Clinical severity of COVID-19 was assessed at the time of diagnosis, during the treatment with the study drug, and at the end of treatment according to the following criteria [Mild: only mild symptoms without radiographic featuresModerate: fever, respiratory symptoms, and radiographic signs of pneumoniaSevere: fever, respiratory symptoms, and radiographic signs of pneumonia Critical: meet one of three criteria: (1) respiratory failure needing invasive ventilation, (2) septic shock, (3) multiple organ failure.