Fig. 1: Representative lung CT scans (transverse plane) of three subjects with COVID-19.

a Ground-glass opacity in both lungs; b absorption of bi-lateral ground-glass opacity after treatment (patient 2); c Multiple condensation shadows in both lungs, edges were blurred; d no significant changes on image findings after treatment (patient 8); e multiple ground-glass opacity in both lungs and patchy consolidation in the right lung; and f diffuse condensation shadows with blurred edges; bronchiolar-inflation sign is seen in the left lung tissue area of the lesion after treatment (patient 4).