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Investigating combination HIV prevention: isolated interventions or complex system.

Graham Brown1,2, Daniel Reeders1, Gary W Dowsett1,3

  • 1Australian Research Centre in Sex, Health and Society, La Trobe University, Melbourne, Australia.

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Current HIV prevention research often examines interventions in isolation, hindering understanding of combined effects. Systems science approaches are needed to achieve synergistic outcomes and meet UNAIDS targets.

Keywords:
combination HIV preventioncomplex systemsevaluationevidenceintervention researchtreatment as prevention

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Area of Science:

  • Public Health
  • Epidemiology
  • Health Policy

Background:

  • Treatment as prevention strategies have created new opportunities for HIV transmission reduction.
  • High-income countries invest in combination HIV prevention but lack understanding of intervention dynamics.
  • Combining interventions involves complex, non-linear interactions.

Purpose of the Study:

  • To assess the gap between available evidence and needed evidence for achieving HIV prevention targets.
  • To explore the limitations of current intervention research in understanding combined effects.
  • To propose systems science as a framework for analyzing complex HIV prevention interventions.

Main Methods:

  • Scoping study of published research evidence in HIV prevention in high-income countries.
  • Analysis of the limitations of linear, isolated intervention research.
  • Discussion of implications for future research and investment.

Main Results:

  • A significant gap exists between current evidence and the evidence needed to guide combination HIV prevention.
  • Research predominantly focuses on single interventions, neglecting their interactions and contextual factors.
  • There is a lack of evidence-based indicators for evaluating synergistic effects of combined interventions.

Conclusions:

  • Linear approaches to intervention research will likely prevent the achievement of system-level synergies.
  • Meeting UNAIDS targets for HIV prevention hinges on understanding and achieving systems-level synergies.
  • Systems science offers valuable tools for analyzing complex interactions in combination HIV prevention.