Dental Treatments Are Permanently In Contact With Blood And Saliva. Dentists Are Exposed To Different Types of Diseases, In Addition To The Micro-Organisms In Saliva, Such As HIV, HBV And HCV. This Study Investigated And Compared Dental Students’ Knowledge of Hepatitis B Virus (HBV), Hepatitis C Virus (HCV), And HIV Infection, Attitudes Toward Infected Patients ،And Important Factors AssociatedWith TheWillingness To Treat Infected Patients