A single‐cell RNA‐seq data showed ACE2 is expressed in ductal cells of pancreas (Figure 3e–g and Figure S5), and both ACE2 expression and the fraction of ACE2 + cells among all ductal cells and significantly decrease in T2D patients (GSE83139, p = .00047 and 0.0032, respectively). Here, ACE2 is linked to type 2 diabetes mellitus.