This journal article describes the prevalence, distribution and risk factors for hepatitis C virus (HCV) infection among homeless adults using eight Health Care for the Homeless (HCH) clinics nationally. Data were collected for 387 participants through blood draws, structured interviews and chart reviews. Overall, 31 percent had the HCV virus, including 70 percent among those who were intravenous drug users and nearly 16 percent among reported non-intravenous drug-users. The majority , or 53 percent, of those who had HCV were unaware they had it. Homeless who were more at risk for HCV included intravenous drug users, former prisoners, and those with tattoos. Researchers concluded the homeless clinics serve high concentrations of intravenous drug-users with HCV, making these and similar clinics priority sites for aggressive screening, education, testing, and treatment for HCV and other blood-borne diseases.​