Similar to SARS-CoV-1 and some SARS-like bat coronaviruses, such as W1V1-CoV, SHC014-CoV, and RaTG13, SARS-CoV-2 utilizes angiotensin-converting enzyme 2 (ACE2) as its functional cellular receptor to enter target cells to initiate the virus infection process [28, 32]. This evidence concerns the gene ACE2 and viral infectious disease.