HIV treatment as prevention: natural experiments highlight limits of antiretroviral treatment as HIV prevention

PLoS Med. 2012;9(7):e1001231. doi: 10.1371/journal.pmed.1001231. Epub 2012 Jul 10.

Abstract

There is growing enthusiasm for increasing coverage of antiretroviral treatment among HIV-infected people for the purposes of preventing ongoing transmission. Treatment as prevention will face a number of barriers when implemented in real world populations, which will likely lead to the effectiveness of this strategy being lower than proposed by optimistic modelling scenarios or ideal clinical trial settings. Some settings, as part of their prevention and treatment strategies, have already attained rates of HIV testing and use of antiretroviral therapy--with high levels of viral suppression--that many countries would aspire to as targets for a treatment-as-prevention strategy. This review examines a number of these "natural experiments", namely, British Columbia, San Francisco, France, and Australia, to provide commentary on whether treatment as prevention has worked in real world populations. This review suggests that the population-level impact of this strategy is likely to be considerably less than as inferred from ideal conditions.

Publication types

  • Review

MeSH terms

  • Anti-HIV Agents / pharmacology*
  • Anti-HIV Agents / therapeutic use
  • Australia / epidemiology
  • British Columbia / epidemiology
  • France / epidemiology
  • HIV Infections / drug therapy*
  • HIV Infections / epidemiology
  • HIV Infections / prevention & control*
  • HIV Infections / transmission
  • Humans
  • San Francisco / epidemiology

Substances

  • Anti-HIV Agents