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Serial lung ultrasound images from a 35-y-old emergency physician who tested positive for COVID-19. (a) Scattered B-lines in both lungs, with thickened pleural line, at an early stage of the disease. (b) Diffused B-lines (white-lung sign) with disease progression. (c) Subsequent subpleural consolidation in a later stage of the disease. Reprinted with permission from Tung-Chen (2020).
