Pulmonary AT2 cells, liver cholangiocytes, colonocytes, esophageal keratinocytes, ileum and rectum endothelial cells, stomach epithelial cells and renal proximal tubules presented the highest ACE2 levels, indicating that these cells could be susceptible to SARS-CoV-2 and be used in infection models [44]. The gene discussed is ACE2; the disease is infection.