Screening for Hepatitis B, Hepatitis C and AIDS Viruses Using Dried Blood Spot

This study is testing whether a rapid, non-invasive saliva-based test can reliably screen for hepatitis B, hepatitis C, and HIV — making it easier for people who use drugs to get tested, since they may have difficulty accessing traditional blood draw testing at a clinic. **You may be eligible if...** - You are a current or former intravenous or nasal drug user - OR you are currently receiving medication-assisted treatment for opioid dependence (such as methadone or buprenorphine) **You may NOT be eligible if...** - You are already known to have an active viral infection (hepatitis B, hepatitis C, or HIV) Talk to your doctor to see if this trial is right for you.