LAUSR

A 2-year-old boy was admitted to our hospital with lethargy. He had been treated for iron-deficiency anemia and failure to thrive 1 year earlier. On examination, he appeared pale and had tachypnea and tachycardia, without abnormal breath or heart sounds. His temperature was 36.7 ° C, pulse rate 180 beats per minute, respiratory rate 56 breaths per minute, oxygen saturation 76%, and blood pressure was 101/58 mm Hg. Despite the low oxygen saturation level, he could speak and walk independently. Laboratory tests revealed a white blood cell count of 13.7 9 10 9 /L, a hemoglobin concentration of 8.9 g/dL, and a C-reactive protein level of 15.3 mg/L. The chest X-ray diffuse pulmonary (Fig. 1). A computed tomography (CT) scan of chest alveolar patients severe acute respiratory syndrome 2