Clinical Enroll

4 Patients Randomized. $1,250 Per Randomized Patient.

A GSK-sponsored influenza vaccine study site met its enrollment target through a compliant, data-driven campaign, backed by a randomization commitment written into the contract.

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4

Patients Randomized

$5,000

Campaign Investment

$1,250

Cost Per Randomized Patient

Sponsor

GlaxoSmithKline

Vaccine candidate

GSK6479720A / GSK6479715A (mRNA-based multivalent seasonal influenza vaccine)

Phase

2a

Condition

Influenza, seasonal

Key eligibility

Ages 18+, BMI 18–33, healthy or medically stable, excludes immunosuppression, flu vaccine within 180 days, concurrent mRNA vaccine within 28 days, or history of Guillain-Barre syndrome, myocarditis, or pericarditis

Registration

NCT07121192 on ClinicalTrials.gov

Enrollment Shortfall on a Sponsor-Priority Study

For sites participating in GSK-sponsored studies, sponsor visibility into site performance is a constant operational reality. Enrollment metrics are tracked. Sites that fall short face questions from clinical operations teams and, in some cases, reduced allocation in future studies. For this Vaccine study site, the enrollment gap was not large. Four additional randomized patients were needed. But the window to close it was not open-ended.

The site's internal capacity to generate incremental enrollment was limited. Active coordinators were managing existing screen-fail rates and ongoing protocol obligations. Adding a patient recruitment initiative on top of current workload was not operationally feasible without external support that carried its own performance accountability.

The requirement was specific: a partner who would commit to randomized patients, not screened leads.

Pre-Screened. IRB-Ready. Randomization Guaranteed.

Clinical Enroll evaluated the GSK Vaccine study protocol for feasibility, assessing patient population density within the site's catchment area and whether a $5,000 campaign could support a four-patient randomization commitment. Feasibility confirmed the engagement. The commitment was formalized in contract before campaign launch. Pre-screening was built into the referral process, aligned to the protocol's primary inclusion and exclusion criteria.

Target Enrollment Met. Sponsor Relationship Maintained.

The campaign delivered 4 randomized patients against a $5,000 investment, a cost per randomized patient of $1,250.

Per-patient site fees in sponsor-initiated Phase II-III studies typically range from $3,000 to $15,000 per randomized patient. At an estimated $3,000 to $15,000 per-patient site fee, 4 randomized patients represents a potential $12,000 to $60,000 in patient revenue against a $5,000 campaign investment.

For a site operating under sponsor performance visibility, the enrollment outcome carried additional value: the protocol was completed as scoped, and the site's enrollment record with the sponsor was preserved. The randomization commitment meant the site did not carry financial exposure for campaign underperformance.

POTENTIAL ROI

$5,000

Campaign investment

$3k-$15k

Per-patient site fee range

$12k-$60k

Potential patient revenue

How Feasibility Was Verified Before Launch

Clinical Enroll evaluated the GSK mRNA influenza vaccine protocol for feasibility before extending a randomization commitment, weighing the study's medical-stability and vaccine-history exclusion criteria against the site's catchment area and the $5,000 campaign envelope needed to close a four-patient gap under sponsor visibility.

  1. Protocol and eligibility review — study criteria verified against the registered protocol, NCT07121192.
  2. Addressable population modeling — eligible adult population assessed within the site's catchment area against the BMI and medical-stability requirements.
  3. IRB-ready campaign build — condition-targeted creative and channels developed for compliance review.
  4. Pre-screening — every referral is screened against the study's inclusion and exclusion criteria before reaching the site.
  5. Contracted randomization commitment — the enrollment target is fixed in writing before the campaign launches.

Read more about how Clinical Enroll runs feasibility assessments before every engagement.

Common questions about this engagement.

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All campaigns developed for IRB review and deployed in accordance with FDA guidance on clinical trial advertising.