Fig. 4
From: Clinical and CT findings of COVID-19: differences among three age groups
Typical pGGO case a: Moderate type patient. CT showed multiple pGGOs in the bilateral lung lobes with halo sign (arrow). Some of the lesions were located under the pleura. Typical mGGO case b: Moderate type patient. CT showed a subpleural mGGO within a solitary nodule (arrow)