Participant Recruitment Strategies: A Global Health Perspective (2025)

Unlocking the Power of Community Engagement in Clinical Trials

In the race to develop life-saving vaccines, every step matters, especially when it comes to recruiting participants.

Alemnew Dagnew, a vaccine development leader at Gates Medical Research Institute (Gates MRI), sheds light on the unique challenges and strategies of participant recruitment in low- and middle-income countries (LMICs).

The urgency to combat infectious diseases like tuberculosis (TB) in LMICs is undeniable. With TB claiming over 1.2 million lives in 2023, the need for effective vaccines is paramount. But here's where it gets tricky: how do you recruit participants for clinical trials in these regions?

The answer lies in understanding the community's perspective.

Dagnew emphasizes the importance of community engagement, stating, "Participant recruitment for clinical trials entails significant work with communities to ensure their understanding of the research goals." This is not just about informing; it's about fostering a sense of shared responsibility.

The TB Vaccine Challenge

TB, the world's deadliest infectious disease, has a surprising reality: despite its impact, there's only one vaccine, BCG, which has limited effectiveness against pulmonary TB in adolescents and adults. This is where the M72 vaccine comes in, aiming to fill this critical gap.

Identifying Hotspots: A Strategic Move

To conduct a large-scale Phase 3 trial for M72, Dagnew's team had to be strategic. They conducted an epidemiologic study across 14 countries and 45 sites to identify TB hotspots. This approach ensured they could enroll a large number of participants from high-burden areas, accelerating the trial's progress.

But why is this important? Well, the analysis of the M72 vaccine's efficacy is event-triggered, requiring 110 laboratory-confirmed pulmonary TB cases. Conducting the trial in high-burden settings ensures these events occur more rapidly, expediting the evaluation process.

Building Trust: A Community-Centric Approach

Community engagement is not a one-time task. Dagnew's team engaged with a global community advisory board, incorporating their feedback into the trial strategy. This approach ensures that the community's voice is heard and respected.

At the local level, clinical trial sites establish relationships with community advisory boards (CABs) and involve local leaders and health workers. This fosters trust and ensures that community concerns are addressed.

Leveraging Local Partnerships: A Win-Win Situation

Collaboration with local healthcare providers is key. By working with TB clinics, the team can identify TB hotspots more effectively and ensure the necessary infrastructure is in place. This not only benefits the trial but also strengthens local healthcare capabilities.

And this is the part most people miss: community engagement isn't just about recruitment; it's about leaving a lasting positive impact on the community.

In conclusion, participant recruitment in LMIC clinical trials is a complex process that requires a deep understanding of the community's needs and active engagement. By building trust and leveraging local partnerships, clinical trials can achieve success while contributing to the overall well-being of the communities they serve.

What are your thoughts on the role of community engagement in clinical trials? Do you think it's an essential aspect that should be prioritized, or are there other factors that deserve more attention? Share your insights in the comments below!

Participant Recruitment Strategies: A Global Health Perspective (2025)

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