Blood-borne viruses (BBVs) include hepatitis B, hepatitis C, and the human immune-deficiency virus (HIV). These viruses BBVs are passed from person to person through blood-to-blood and are relevant to injecting drug use. The best way to protect yourself from BBVs is to avoid anyone else's blood coming into contact with yours. A big risk for getting BBVs is injecting drugs. HIV and hepatitis B can also be sexually transmitted.