(A) ACE2 expression by bulk RNA-seq across healthy tissues from GTEx. Gray box highlights the tissues with highest expression including small intestine and kidney; green arrow indicates lung. (B–C) Expression of ACE2 and other coronavirus receptors by proteomics across over 20 healthy human tissues from the Human Proteome Map (B) and the Human Protein Atlas (C). (D) IHC stained images showing ACE2 expression in the kidney, small intestine, and colon, with minimal or low expression detected in respiratory tissues.