Is FURIN gene expression in salivary glands related to SARS-CoV-2 infectivity through saliva?

Unravelling the SARS-CoV-2 mechanism of entry into host cells is engaging the endeavours of researchers worldwide and, although angiotensin-converting enzyme 2 (ACE2) is recognised as the primary receptor, many issues remain to be investigated.1 Remarkably, the interaction between ACE2 and the spike (S) glycosylated protein of SARS-CoV-2 necessary for viral entry has been discovered by employing crystallography. S protein presents a receptor...