Fig. 2.

a A chest computed tomographic image and chest X-rays of case 2. A CT scan showed bilateral and peripheral ground-grass opacities (GGO) on day 1. The GGO on X-rays expanded especially through day 1 to day 7. On day 15, the area of GGO was reduced. b Clinical course of case 2. As with case 1, the level of CRP decreased and PaO₂/FiO₂ ratio was improved after the administration of tocilizumab and IVIG