Feasibility of Interventions on People Who Inject Drugs in Vietnam

This study aims at assessing the feasibility of implementing an interventional cohort of people who inject drugs in Haiphong, Viet Nam. For this purpose, the investigators will conduct a RDS survey to i) assess the current situation of drug use behaviour, HIV and Hepatitis C Virus (HCV) infection in the study population and ii) recruit participants for the longitudinal phase. The latter will consist of enroling the most difficult to reach People Who Inject Drugs (PWID) (those not followed by health centers), including early injectors, Men who have Sex with Men (MSM) and female sex workers (FSW) and following them up for 6 months in order to estimate the follow-up rate and preliminary estimates of HIV and HCV incidence.