“…From the beginning of the COVID-19 outbreak, simultaneously with treatment measures, health and preventive measures such as strict quarantine, social distancing, hand washing, disinfection of various surfaces, and wearing a mask among others, as health protocols to reduce and cut off the transmission chain were on the agenda of governments and health organizations [1,2]. SARS-CoV-2 infects target cells primarily via interaction of the receptor-binding domain of the S protein with the cellular angiotensin-converting enzyme 2 (ACE2) receptor after activation of the S protein by transmembrane serine protease 2 (TMPRSS2) [3]. The S protein is composed of two functional subunits, S1 and S2; S1 is responsible for receptor binding, whereas S2 (the C-terminal domain) is specifically responsible for viral-cellular membrane fusion [4,5].…”