“…Sound or moderate evidence to support this mechanism was reported in 18 views studies indicating that the ‘ understanding ’ mechanism was also valued by immigrants themselves in contributing to culturally appropriate HIV prevention [115,120,121,125-127,129-133,139,144,147,150,165,166]. There was partial evidence from a further eight studies for this mechanism largely inferred from the use of community languages by the researchers to successfully elicit the views of immigrants [117,119,135,137,141,142,148,149]. The strengths of ‘ understanding ’ mechanisms from the perspectives of immigrants were that communication (reading, writing, listening or speaking) in your preferred first language lowered the threshold of, and maximised participation and engagement with, intervention activities and, in turn, increased the opportunities to act on and benefit from the intervention.…”