| 
      RR: Relative Risk; ARR: Absolute Risk Reduction; MSM: Men Who have Sex with Men; TDF-FTC: Tenofovir-Emtricitabine; TDF: Tenofovir disoproxil fumarate
        | Study | Design | Location | Population | Intervention    arms | RR    (95% CI) | ARR |  
        | iPrEx | Phase III, safety and    efficacy | Brazil, Ecuador,    Peru, South Africa, Thailand, United States | 2499 MSM | Daily oral TDF-FTC | 44%    (15,63) | 2.2% |  
        | TDF2 | Phase III, safety and    efficacy | Botswana | 1219 heterosexual men    and women | Daily oral TDF-FTC | 75%    (55,87) | 2.5% |  
        | Partners rEP | Phase III,  safety and efficacy | Kenya, Uganda | 4758 serodiscordant    heterosexual couples | Daily oral TDF;
          Daily oral TDF-FTC | 62%    (22,83) | 2.4% |  
        | FEM-PrEP | Phase III, safety and    effectiveness | Kenya, Tanzania,    South Africa | 2120 heterosexual    women | Daily oral TDF | 6%    (-52,41) | 0.2% |  |