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VOICE study will continue as it considers what action to take after results of 2 trials
Date:7/13/2011

he DSMB found the results so compelling that it recommended that it stop testing in the placebo group. The research team will be making arrangements so that participants who had been randomly assigned to take a placebo tablet can instead receive one of the study's active study products. Participants in the other two groups will continue to be followed.

In the second study, a smaller trial that involved 1,200 heterosexual men and women in Botswana, researchers from the U.S. Centers for Disease Control and Prevention (CDC) found that 62.6 percent fewer HIV infections had occurred in the group of participants assigned to take Truvada than in the placebo group. The CDC team will be reporting more details about the findings of the study, known as TDF2, at the International AIDS Society Conference on HIV Pathogenesis, Treatment and Prevention in Rome next week.

Both sets of results bolster the findings of iPrEx, which late last year provided the first evidence that oral PrEP can help prevent HIV. iPrEx found Truvada together with a comprehensive HIV prevention package was safe and 44 (43.8) percent more effective than a placebo tablet for protecting against HIV in men who have sex with men. The two studies' favorable results also raise more questions about what happened with FEM-PrEP. Two months ago, researchers announced the trial would be stopping earlier than planned because an interim review of the study's progress by its data monitoring committee determined that even if the study were to continue, it would not be able to conclude whether or not Truvada is effective in its population of women. The study team is still collecting data. A final report is not expected until late this year or early 2012.

Few conclusions can be drawn from the CDC study concerning the effectiveness of Truvada specifically in women. And although Partners PrEP found tenofovir and Truvada worked well for both men and women, the study provides more information abo
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Contact: Lisa Rossi
rossil@upmc.edu
412-916-3315
Microbicide Trials Network
Source:Eurekalert

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