COVID-19 or non-COVID viral pneumonia: How to differentiate based on the radiologic findings?

Figure 3 A 33-year-old man with hypoxic respiratory failure, requiring intubation was polymerase chain reaction positive for influenza A. A: Radiograph shows diffuse granular opacities resembling pulmonary interstitial edema; B: A contemporaneous axial computed tomography (CT) (arrows) shows diffuse ground glass opacities with patchy consolidations that are both in peripheral and central zones. Pleural effusion (asterisk) is more common in influenza A pneumonia than coronavirus disease 2019 (COVID-19); C: Axial CT two months later demonstrates cavitation (arrow) and traction bronchiectasis (curved arrow) which are not frequently reported in COVID-19.