In Canada, it is estimated that there are more than 125,000 injection drug users (IDUs) many of whose lives are marked by poverty, homelessness and mental illness (Fischer et.al., 2006; Kerr et al, 2003). The City of Montreal in the province of Quebec, Canada, has an estimated 1DU population of between 4300 and 12,500 individuals (Archibald et al., 2001). IDUs in Montreal are at elevated risk of HIV and HCV (Wall et al., 2001). In Montreal for example, the prevalence rate of HIV related to IDUs has been documented to be as high as 18 percent and 68 percent for HCV (Roy et al., 2012).
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机译：在加拿大，据估计有超过125,000个注射吸毒者（IDU），其中许多生活以贫穷，无家可归和精神疾病为特征（Fischer et al。，2006; Kerr et al，2003）。加拿大魁北克省的蒙特利尔市估计有1DU人口，约4300至12500人（Archibald等，2001）。蒙特利尔的注射毒品使用者感染艾滋病毒和丙肝的风险较高（Wall等，2001）。例如在蒙特利尔，与吸毒者有关的艾滋病毒感染率据报道高达HCV的18％和68％（Roy等人，2012）。
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