Like the β-coronavirus that caused the 2003 outbreak of the severe acute respiratory syndrome (SARS-CoV), SARS-CoV-2 virus also employs its envelope spike (S) glycoproteins to bind a host cell surface receptor, the angiotensin-converting enzyme 2 (ACE2), to gain host cell membrane fusion and viral entry (Hoffmann et al. 2020). This evidence concerns the gene ACE2 and severe acute respiratory syndrome.