In all layers of the mouse vaginal epithelium, furin expression is high (Kines, Thompson, Lowy, Schiller, & Day, 2009), while in the human oral epithelium, furin expression is low, detectable only in the upper spinous and surface layers, not in the lower basal cell layer, where HPV initiates infection (López de Cicco, Bassi, Page, & Klein‐Szanto, 2002). The gene discussed is FURIN; the disease is infection.