“…Injection drug users (IDUs) suffer an increased burden of infectious disease, co-morbid health conditions and elevated mortality rates in comparison to the general population (Fischer, Firestone-Cruz, & Rehm, 2006;Spittal, Hogg, Li, Craib, Recsky, Johnston et al, 2007). Further, IDU is linked to a multitude of vulnerabilities and social disadvantages (e.g., poverty, homelessness, mental illness), involvement in high-risk illegal income generating activities (e.g., sex work, drug dealing), and public disorder behaviours (e.g., public injecting), that also contribute to compromised health and well-being (Galea & Vlahov, 2002;Fischer et al, 2006;DeBeck, Shannon, Wood, Li, Montaner, & Kerr, 2007; DeBeck, Small, Wood, Li, Montaner, & Kerr, 2009;Miller, Pearce, Moniruzzaman, Thomas, Christian, Schecter et al, 2011). Consequently, IDUs are a highly marginalised and stigmatised population with multiple and complex needs, yet are hard to reach with mainstream health care services (Ahern, Stuber, & Galea, 2006;Simmonds & Coomber, 2007).…”