HIV prevalence among people who inject drugs in the Middle East and North Africa as extracted from reports included in the systematic review.

aPopulation-adjusted estimate.bSelf-report.CS, convenience sampling; ID, infectious disease; MSCS, multi-stage cluster sampling; RCS, random cluster sampling; RDS, respondent driven sampling; SBS, snow ball sampling; SRS, simple random sampling; TLS, time location sampling; VCT, voluntary counseling and testing.