FIGURE 1.

Representation of the airway and alveolar's biochemistry during classic acute respiratory distress syndrome (ARDS) and in COVID‐19‐induced ARDS. In both syndromes, the alveolar‐interstitial‐capillary structure is similarly affected. There is an increase in pro‐inflammatory biomarkers, endothelial and capillary permeability, in addition to an increase in inflammatory cells (neutrophils, monocytes and macrophages) in vessels and alveoli. However, the increased biomarkers in the two syndromes are distinct. Image adapted from ⁶⁰