High prevalence but low awareness of hepatitis C virus infection

Addict Behav. 2013 Apr;38(4):2089-93. doi: 10.1016/j.addbeh.2013.01.010. Epub 2013 Jan 17.

High prevalence but low awareness of hepatitis C virus infection among heroin users who received methadone maintenance therapy in Taiwan.

The prevalence of HCV infection was 90.8%. All participants who were HIV-positive were also infected with HCV. Multivariate logistic regression analysis showed that the route of heroin administration (injection), HIV-infection, and criminal records were significantly related to HCV infection. 

Few (34.8%) HCV positive heroin users were aware of their infection.