Fig. 4
From: Chest x-ray findings and temporal lung changes in patients with COVID-19 pneumonia
The spatial distribution of the lung changes at various time intervals from symptom onset. a Zonal distribution. The right lower zone remained the most frequently involved over time, the left upper and left middle zones were the least to be involved. b Horizontal distribution. The lung changes were more frequently seen in a peripheral distribution. Isolated central involvement of the lung changes was not observed in any of the chest x-rays. c Distribution according to side. Bilateral distribution of the lung changes was more common than unilateral involvement