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An Overview of Lenacapavir for PrEP Trials

The PURPOSE trials evaluate the safety and efficacy of injectable lenacapavir (LEN), an investigational antiretroviral (ARV) drug being studied as a potential PrEP product. This graphic shows the latest status of all five trials including the groundbreaking results of PURPOSE 1 and PURPOSE 2.

Prevention Option:

February 2026


AVAC Infographics for CROI 2026

Going to CROI? AVAC’s up-to-date infographics — on the research & development pipeline, prevention options, and the impact of US funding cuts — are available here for use in conference presentations. We constantly update these graphics, so check back for updates. The latest version of the deck will be available here.

February 2026


AVAC’s Year in Review

In a year marked by funding freezes, political disruption and historic scientific breakthroughs, we are proud to share our 2025 Year in Review – one defined by crisis and resilience.

February 2026


February 2026


EXPrESSIVE Phase III Program Countries of MK-8527

Seventeen countries are hosting sites for the Phase 3 efficacy trials of a monthly PrEP pill, MK-8527, being developed by Merck (also known as MSD outside of the US and Canada). Merck announced the launch of the Phase 3 trials at IAS 2025 in Kigali. MK-8527 was found to be safe and well-tolerated in Phase 2 clinical trials.

Prevention Option:

February 2026






February 2026


showing 1-10 of 5622