Despite the detection of SARS-CoV-2 in the clinical specimens obtained from the upper respiratory tract, the overexpression of angiotensin-converting enzyme 2 (ACE2), and transmembrane protease serine 2 (TMPRSS2) genes determine the nature of SARS-CoV-2 as an infection of the lower respiratory tract [13]. Here, TMPRSS2 is linked to infection.