ACE2 and viral infectious disease: There is now a consensus that the final effect of the RAAS cascade depends on a fine equilibrium between the ACE/Ang II/AT1R and ACE2/Ang (1‐7)/MASR/AT2R axes (Figure 2); their uncoupling is implicated in the pathogenesis of different lung diseases, including viral infection by respiratory syncytial virus and SARS‐CoV,18, 42 pulmonary hypertension,43, 44 and acute lung injury.45, 46