Fig. 3From: Frequency of atypical pulmonary manifestations of COVID-19 patients on chest CT-scan: a cross-sectional studyHalo sign in A 38-year-old woman, B 44-year-old man with COVID-19. Axial non-enhanced chest CT image on the lung window shows consolidation surrounded by ground-glass opacity (red frame) in A RLL and B RULBack to article page