Filling the knowledge gap: Measuring HIV prevalence and risk factors among populations most vulnerable to HIV/AIDS in Libya

Using respondent-­driven sampling(RDS), we conducted a cross-­secional survey among 328 people who inject drugs PWID), 227 men having sex with men (MSM), and 69 female sex workers (FSW) in Tripoli. (Unfortunately, FSW target sample size was not reached, the study was interrupted by poliIcal turmoil in February 2011). We collected behavioural data and blood samples for HIV, hepaIIs C and B testing.