diseases” versus “physical proximity to others.” Historically, professionals in dentistry have been vulnerable to a number of infectious diseases, including hepatitis B (HBV), hepatitis C, herpes simplex virus, Epstein-Barr–derived infectious mononucleosis, tuberculosis (TB), cytomegalovirus, rubella, gonorrhea, syphilis, influenza, and HIV. 4 Dental literature from 1989 5 cited 14% of general dentists and “nearly twice that number of oral and maxillofacial surgeons” testing positive for viral HBV markers. Accordingly, the American Dental Association (ADA) developed