Infection by the SARS-CoV-2 starts from the cellular entry of the virus through the interaction between the viral Spike (S) protein with its cell surface receptor ACE2 (angiotensin-converting enzyme 2) and priming of the S protein by the cellular protease TMPRSS2 (transmembrane serine protease 2) (Hoffmann et al., 2020). This evidence concerns the gene ACE2 and infection.