As more next-generation PrEP options become available, HIV prevention research is shifting away from large, multi-year efficacy trials toward pharmacokinetic (PK) and bioequivalence (BE) studies — which test whether a new formulation behaves in the body like a product already proven to work. This primer explains the shift and what it means for advocates.
Advocates’ Primer: Understanding Bioequivalence and Pharmacokinetic Studies in Next-Generation HIV Prevention Products
An Advocates’ Checklist for Lenacapavir for PrEP Introduction
The Civil Society Caucus of the Coalition to Accelerate Access to Long-Acting HIV PrEP developed a new resource that offers practical guidance to help civil society, advocates and implementers accelerate equitable access to LEN for PrEP. The checklist is designed to support faster, community-centered rollout ahead of broader generic availability in 2027.
Lenacapavir Regulatory Approval
Regulatory approvals, pending decisions, and appeals as of May 2026. For product approvals, volumes, implementation, and price comparisons of long-acting PrEP, visit our dashboard on PrEPWatch.org.
EXPrESSIVE Phase III Program Countries of MK-8527
Seventeen countries are hosting sites for the Phase III 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 III trials at IAS 2025 in Kigali. MK-8527 was found to be safe and well-tolerated in Phase II clinical trials.
PrEPWatch: Transforming Data into Action for PrEP Access
AVAC Impact Reports highlight the power of advocacy, research translation, and partnership to advance HIV prevention and global health equity. Read also about how African leadership drives HIV prevention access.

By Grace Tetteh
AVAC’s PrEPWatch is the trusted global repository for comprehensive, user-friendly and up-to-the-minute information about HIV prevention methods. The platform provides data, analysis, tools, and comprehensive resources that are widely used by governments, donors, and partners to inform HIV prevention policy, financing, and programmatic decisions. AVAC ensures that data are available, accessible, and now in partnership with its sister organization, Access Bridge, used to strengthen the efforts of advocates, civil society, policy makers, and funders to translate evidence into action.
Transparent data enables accountability by making gaps visible and actionable, leading to informed global advocacy and decision making that improves equity in PrEP access worldwide. The evidence collected and housed on PrEPWatch, especially through the Global PrEP Tracker, is more critical than ever as the current US administration dismantles USAID and increasingly restricts access to data. In May 2026, AVAC documented the drastic declines in PrEP initiations following cuts to PEPFAR in 2025.
A Brief History of PrEPWatch: Anticipating the results of the tenofovir PrEP trials
In 2005, with early clinical trials of oral tenofovir for PrEP underway and quite controversial, AVAC began tracking the early clinical trials – and the criticisms of them – in the report Will a Pill a Day Prevent HIV? It outlined key information about tenofovir, how it could be used to prevent HIV, tracking details on the status of clinical trials worldwide and surfaced insights, recommendations, and key questions about research ethics, product availability, and equitable access. Critically, it pushed the field to proactively consider and plan for equitable, comprehensive scale-up, should the pill work to prevent HIV.
The report became the foundation for PrEPWatch, which more than two decades later serves as the global resource for information, investigation and documentation for all PrEP products, both approved and in development.
Today, PrEPWatch hosts over 1,000 resources and attracts over 90,000 visitors annually. As the platform expands, so does its recognition as a trusted data source for media outlets, researchers, advocates, and other stakeholders. As Wesley Sundquist, biochemist at the University of Utah and one of TIME’s 100 Most Influential People of 2025 for groundbreaking research leading to the development of lenacapavir for PrEP (LEN), said about resources on LEN rollout: “This information is particularly valuable for me because I don’t follow the latest developments in the rollout nearly as closely as you do; it’s enormously useful for me to hear about this and transmit it accurately.”
The reach and visibility of PrEPWatch demonstrates the broad circulation of essential prevention resources and their fieldwide utility. From a single report 22 years ago, PrEPWatch has evolved into a trusted global resource that supports a broad network of informed stakeholders to engage with data to advance prevention and strengthen the overall HIV response.
Data transparency and accountability promote equity for PrEP access worldwide

One of the most powerful PrEPWatch resources is The Global PrEP Tracker — a comprehensive database with more than 15 years of country-specific data on PrEP initiations, uptake, and regulatory approvals. Updated on a quarterly basis, the dataset enables users to conduct country comparisons and analyses of trends over time, and surfaces insights on progress, setbacks, gaps, and inequities of PrEP availability and access worldwide. This historical and easily accessible dataset is a powerful tool for advocates, policymakers, and implementers to better understand national and regional data as they develop contextually relevant HIV prevention strategies and priorities.
Timely and actionable evidence supports coordinated and accelerated introduction of new prevention tools
As new prevention options emerge, maintaining access to timely, reliable information is critical to ensure effective planning, coordination, and scale-up. Lenacapavir offers the newest and one of the most tangible opportunities to curb the epidemic. It has surpassed previous milestones for the speed of regulatory approvals, guideline development, generic licensing and product introduction compared to previous PrEP products. At every step in the process from disseminating trial results to rollout, PrEPWatch has provided up to the minute resources and information to support LEN introduction and scale-up.
Across the early adopter countries of LEN for PrEP, national governments, supported by advocates, civil society organizations, and donors, used these resources to develop country-specific guidelines, implementation roadmaps, and projections for product demand and supply. As LEN introduction and scale up progresses, PrEPWatch remains essential to ensuring responsive evidence is available to support accelerated roll out, transforming innovation into real-world impact for communities.
“PrEPWatch is an invaluable clearinghouse to access global PrEP guidelines and resources for PrEP implementation. WHO is proud to have their documents included on this one-stop shop.”
—Michelle Rodolph
Leads HIV prevention and PrEP activities, World Health Organization
Sustaining access to credible evidence is a shared responsibility and commitment
PrEPWatch is an open-access platform across the HIV prevention ecosystem built on the collective contributions of partners and collaborators. Data, insights, updates, and resources are shared, synthesized, and translated to ensure accuracy and availability to a wide variety of stakeholders that are shaping policy, driving implementation, and advocating for equitable access to HIV prevention. As the pipeline continues to expand, AVAC and Access Bridge will ensure PrEPWatch remains responsive by providing comprehensive and timely resources that improve product introduction and access.
Avac Event
PrEP Power Webinar — Global Countries
The recent significant changes to global health funding have severely impacted HIV prevention services for those who need them most, in particular key populations (KPs). Already, some countries are seeing concerning trends in data suggesting a resurgence in new infections. At the same time, powerful new HIV prevention options are now a reality, though their promise is not set to be fully realized according to current planning.
This is the second in a series of two webinars providing an overview of what is happening now in countries to HIV prevention services for KPs, featuring tools and analyses produced by GBGMC, in partnership with Access Bridge to support advocacy and planning at country levels.
Speakers will include an array of experts on the global landscape, as well as country and community perspectives.
Discussions Will Explore:
- Global product introduction experiences
- Lessons from early adopter countries
- Policy environments and implementation realities
- Strategies for equitable LEN access
Featured Countries: Brazil, France, Philippines, Ukraine, United States, Vietnam

Avac Event
PrEP Power Webinar — African Countries
The recent significant changes to global health funding have severely impacted HIV prevention services for those who need them most, in particular key populations (KPs). Already, some countries are seeing concerning trends in data suggesting a resurgence in new infections. At the same time, powerful new HIV prevention options are now a reality, though their promise is not set to be fully realized according to current planning.
This is the first in a series of two webinars providing an overview of what is happening now in countries to HIV prevention services for KPs, featuring tools and analyses produced by GBGMC, in partnership with Access Bridge to support advocacy and planning at country levels.
Speakers will include an array of experts on the global landscape, as well as country and community perspectives.
Featured countries: Eswatini, Kenya, Lesotho, Malawi, Mozambique, Nigeria, South Africa, Uganda, Zambia, Zimbabwe

PxWire Volume 16, Issue 2
This issue showcases AVAC’s analysis of the recent PEPFAR data release, assessing how uptake of prevention programs—particularly PrEP initiations—have declined over the last year. As the field grapples with the lasting impact of the US government’s cuts to PEPFAR programs, AVAC takes a closer look at what the data show and what is still missing.
This is especially timely, given the recent announcement from PEPFAR and the Global Fund of their additional commitment to scale-up lenacapavir (LEN) for PrEP. AVAC’s recent infographic unpacks the enduring gap between current donor commitments, LEN volume capacity and potential market size. Lastly, AVAC’s newest infographic depicts the long-acting HIV treatment R&D pipeline. Coupled with research on long-acting prevention and vaccines, long-acting treatment is an important component of an integrated approach to ending HIV as a global health threat.
Read below or download a PDF version of this issue.
Progress in PrEP Uptake

- On April 17, the US State Department released long-awaited PEPFAR data from the last quarter of Fiscal Year 2025 (FY25), representing the only data available on the status of PEPFAR programs following the US government’s drastic cuts to foreign assistance programs. Only one quarter of data, covering the fourth quarter of FY25 (July-September 2025) was released, and no data are available from the last six months of implementation.
- While PEPFAR promoted the data release as reflecting significant progress in curbing the epidemic, the data actually reveal stark declines in HIV testing, diagnosis, and treatment. HIV prevention programs were some of the hardest hit by both cuts to PEPFAR programs and the narrowing focus on prevention for pregnant and breastfeeding women (PBFW).
- In FY25, the number of individuals newly initiated on PrEP decreased by 41% as compared to the same quarter in FY24, with an overall decrease of 54% among all men and 53% among women who are not pregnant or breastfeeding. While PEPFAR touted a 140% increase in PrEP initiation among PBFW, the disaggregated data is historically inconsistent and not available in the latest data release; therefore it cannot be independently verified.
- Especially worrying was PrEP initiations among adolescent girls and young women (AGYW) aged 15-24, which fell by 39% as compared to a 26% drop among women aged 25-49. AGYW previously benefited from PEPFAR’s DREAMS programs—packages of prevention services to address the high incidence of HIV among AGYW—but the number of program recipients decreased by 86% in FY25 as many of these programs were defunded.
- Most alarmingly, the data do not include any information on HIV prevention services or PrEP initiation among key populations, including men who have sex with men, transgender people, and sex workers. This lack of data, coupled with the elimination of prevention programs for these populations, reflect an erasure of individuals at high risk for HIV that face life-threatening cuts to services.
Achieving Global 2030 Prevention Targets
The Global HIV Prevention Coalition (GPC) recently launched its HIV Prevention 2030 Global Access Framework, outlining how, by 2030, countries can ensure that 90% of people in need of HIV prevention services have access and that 90% of people living with HIV are virally suppressed. This, in combination, would lead to a 90% reduction in new HIV infections globally. “Innovations, especially lenacapavir, have added to the array of prevention choices. History will judge us harshly if we as a global community fail to meet this scientific moment,” said Mitchell Warren, GPC Co-Chair on a recent webinar. Actions must be country-led, sustainable, people-centered, and rooted in community leadership to achieve these targets.
PrEParing for New Products

- On April 14, the US State Department and the Global Fund announced an increase of their original commitment of LEN for PrEP, from two million to three million people over three years.
- Gilead has confirmed that it is not supply constrained and can supplement generic supply until it is steady, as long as they receive orders within time, based on their sixto nine-month production lead time needed. Generic supplies are expected to reach the market by the middle of 2027, but their capacity and lead times are not yet known.
- While this is an important step, it does not go far enough to have meaningful impact on rapid scale-up of LEN, and there are no guarantees that the product will reach those who need it most, including key populations and adolescent girls and young women.
- AVAC and Access Bridge see more potential to build the market by meeting market demand, leading ultimately to a reduced price, higher annual volumes and significantly increased impact.
- To achieve this, key priorities over 2026 and 2027 must be advanced:
- Global Fund and PEPFAR need to raise the floor of their commitment to reach at least four million people in two years.
- Global Fund must ensure that they have the resources to procure these volumes and meet demand, requiring resource mobilization beyond the recent GC8 replenishment.
- Global Fund and PEPFAR need to provide clear, transparent LEN access plans, with volumes and countries, ensuring a more comprehensive joint strategy in more countries, as well as volumes and prices with Gilead and generics.
- All procurers must place orders for 2027 by June 2026 with both Gilead and generics to ensure uninterrupted supply and expanded global access, whether through the Global Fund or directly with manufacturers.
- Ministries of Health must collaborate with implementation partners and civil society to ensure people-centered approaches to rollout, and to address supply and demand issues as they emerge and develop robust forecasts for 2027.
- Generic manufacturers must specify their lead-times from order to delivery to coordinate and ensure timely procurement.
- Gilead must urgently finalize license and supply agreements for middle-income countries, especially in Latin America and Asia.
The Latest in the HIV Research Pipeline

- AVAC has recently begun to track the research pipeline for long-acting HIV treatment (LA-ART). This focus aligns with AVAC’s work to advance an integrated approach to ending HIV transmission, including a comprehensive agenda for the development of novel and longer-acting products beyond PrEP, inclusive of PEP and treatment.
- A rapidly expanding pipeline for LA-ART has the potential to introduce new regimens with dosing frequencies that range from weeks to months to, eventually, years. The benefits of LA-ART include reduced drug dosing, frequency, and number of drugs, with the potential for associated decreases in the cost of medications and the burden on health systems. New drug classes could close treatment gaps in children, adolescents, and those with high viremia, comorbidities and resistance.
- CROI 2026 highlighted the potential future LA-ART landscape beyond today’s 2-month CAB + RPV injections. The range of products in development includes novel characteristics such as new ART classes and monoclonal antibodies, new ARV combinations, delivery via oral, implantable and injectable formulations, and longer regimens—currently up to six-months.
- Ongoing clinical research will hopefully further demonstrate whether there are trade-offs (treatment failures or resistance) between LA-ART and highly effective daily oral ART. In addition to the new long-acting products, simplified single-tablet daily regimens are also in development.
Building the Market for New Products from the Trial Stage
MK-8527 is currently in Phase III trials (EXPrESSIVE-10 and EXPrESSIVE-11) across 17 countries. To build a supportive environment around the concept of a monthly oral PrEP pill, AVAC supported the development of communications materials for use in the EXPrESSIVE-11 trial which can be adapted for future market entry. AVAC worked with local partners and MSM, transgender, and non-binary communities in 8 trial countries in Africa, Asia, and Latin America to co-create the materials, ensuring that focus populations contributed to the design. The result is a global campaign with a localized feel that is generating awareness on MK-8527 early.
Prevention Playlist
AVAC develops a wide range of resources to inform decision making and action. Check out the latest:
Join
- INTEREST 2026
- Launching STI Advocacy Hubs: National Agendas from Kenya, South Africa & Zimbabwe
- Sign up for Global Health Watch: AVAC’s weekly STIWatch Quarterly Newsletter – Q1 Newsletter: newsletter to keep advocates informed, prepared
Use
- Overview of Key LEN Dose, Volumes, Timelines and Prices
- STI Advocacy Agendas
- HIV Prevention 2030 Global Access Framework
Watch/Listen
- The Choice Agenda Webinar: The Injectors of Tomorrow are Here Today
- Putting communities first in HIV Research with Yvette Raphael
- Dapivirine Ring: Giving Women Hope and Choice in HIV Prevention countries in Africa, Asia, and Latin America to co-create the materials, ensuring that focus populations contributed to
Read
Where We Are Now with LEN for PrEP
This timeline tracks the regulatory approval process for lenacapavir (LEN) for HIV prevention from late 2024 through early 2026. Key milestones include FDA Priority Review status, FDA approval in June 2025, expected subsequent approvals from European regulators and WHO, and Global Fund and PEPFAR commitment to roll out LEN to three million people over the next three years.
AVAC Infographics for INTEREST 2026
For those presenting at INTEREST (as well as anyone interested in tracking the field), AVAC’s latest infographics on HIV R&D and the delivery pipeline, the current landscape of prevention options are available in an easy-to-use slide format—including lenacapavir for HIV PrEP (LEN) volume commitments, and the impact of US funding cuts with new data from PEPFAR. We hope these are useful for presentations and discussions at the conference and beyond.
We constantly update these graphics, so check back for updates. The latest version of the deck will be available here.



