“…All the nine HIV prevention studies that included controls showed substantial improvement in more than one HIV-risk reduction behavior (sharing syringes, sharing cookers and filters, frequency of injection, unprotected sex) and HIV education communication among social networks comparing control and intervention conditions (43, 44, 46, 54, 58, 66, 68, 78, 80). Four studies documented that SNIs, compared to the control conditions, were successful in recruiting a higher proportion of hard to reach at-risk population, which is the first step of any HIV prevention or treatment programs (43, 44, 58, 80) (Table 3).…”