The potential impact of an HIV vaccine with limited protection on HIV incidence in Thailand: A modeling study

The following is an abstract about the potential benefits of a HIV vaccine. It mentions 'risk compensation' which means abandoning condoms. It points out that mathmatical modelling shows that a partially effective vaccine may lead to increased HIV among sex workers if sex workers are less able to persuade clients to use condoms. The same is true of Prep and microbicides.

Anal sex, vaginal practices and HIV incidence in female sex workers in urban Kenya: Implications for development of intravaginal HIV prevention methods

Multiple intravaginal HIV prevention methods, including microbicide gels, barriers and intravaginal rings, are in clinical development in Africa.

Microbicides and Sex Workers: An Advocacy Brief

There are key issues that must be addressed to ensure that the introduction of non-condom prevention alternatives reduces the vulnerability of sex workers and their clients while avoiding unintended negative consequences. Clearly, the roll-out of such tools, and specifically public availability of the first microbicides, is likely to benefit some people but they could also, inadvertently increase the risk of HIV, STIs and unwanted preganancies for female sex workers. 

Anna Forbes: From Microbicides to Sex Workers—A Logical Development

An article by Lauren Tuck which originally appeared in Poz Magazine

Anna Forbes: From Microbicides to Sex Workers—A Logical Development

Microbicides could increase HIV infections

Mathematical models predicting the effect of microbicides show that their effect on HIV incidence and prevalence could vary enormously, according to local conditions. In some cases their adoption could cause an increase in HIV infections. 

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