ACE2 and viral infectious disease: Because artificial 3D human tissue models of oral, airway and intestinal tissues are well-established and widely accepted for pathophysiology, toxicology, inflammation, virus infection and drug development studies, we used such models to analyze the effects of 23 extracts of novel C. sativa cultivars (#1, #5, #7, #9, #10, #31, #45, #49, #81, #90, #114, #115, #129, #130, #131, #155, #157, #166, #167, #169, #207, #274, #317) on ACE2 expression.