Fig. 2.

Clinical course of the case. Although the acute phase of infection of the novel coronavirus disease 2019 was completed, his need for supplemental oxygen persisted. Persistent lung consolidation and volume reduction were present on day 23. We administered oral prednisolone 70 mg (1 mg/kg/day) starting on day 31 and gradually tapered over 4 weeks. His need for supplemental oxygen at rest disappeared after 2 weeks of steroid therapy. Findings on chest computed tomography scans improved over time. mPSL, methylprednisolone; HFNC, high-flow nasal cannula; LDH, lactate dehydrogenase; CRP, C-reactive protein; CT, computed tomography.