Background HIV Incidence in PURPOSE 1 and 2 PrEP Trials.

Parienti, Jean-Jacques · Clin Infect Dis · 2025

prospective_cohort · Level II

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Abstract

HIV incidence among low-adherence oral PrEP users in PURPOSE 1 and 2 closely matched or slightly exceeded background HIV incidence (bHIV), supporting bHIV as a conservative comparator in PrEP trials. This enables ethical, efficient evaluation of new prevention strategies without placebo arm.

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