Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Immunization: later-stage trial registry
3 of 6 indexed Immunization trials are currently recruiting, with more weight in Phase 3-4.
Corpus placement: #2,866 of 28,707 conditions by registered trial count.
6 US clinical trials · 3 currently recruiting · #2,866 of 28,707 conditions by registered trial count
Immunization: 6 US clinical trials tracked, 3 recruiting.
Immunization is the subject of 6 registered US clinical trials on ClinicalTrials.gov, 3 of them currently open to new participants. 2 are in Phase 3-4 (later-stage) and 0 in Phase 1-2 (earlier-stage). The most active sponsor is The University of Texas Medical Branch, Galveston, running 2 of these trials.
Enrollment posture brief
Registry condition immunization
OPEN 3 | RECR 50% | LATE 2 | EARLY 0 | RANK #2866 | SPON 2
Volume-matched condition peers
Nearest open-share peer: Achalasia (50% recruiting · 8 trials)
Immunization lists 3 open slots (50% of 6 indexed trials). Peers are matched on registered volume, not therapeutic-area browse lists. How peer matching works →
Key findings
What ClinicalTrials.gov does not surface for Immunization on its own pages , computed from the registry mirror as of 2026-08-08. Each line carries its own denominator so it can be quoted as it stands.
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Immunization is recruiting above its size-band peers.
3 of 6 indexed trials (50%) are open to enrollment, against a 46.5% average across 27,806 conditions with fewer than 20 trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.
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One sponsor concentrates Immunization research.
The University of Texas Medical Branch, Galveston accounts for 2 of 6 trials (33.3%). 5 distinct sponsors appear on at least one study for this condition label.
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Typical Immunization enrolment sits around 767 participants.
Median target enrolment is 767 among the 6 trials that report a genuine target (sentinel values excluded). 2 of those (33.3%) plan for fewer than 100 participants.
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Immunization research is mostly interventional.
6 interventional and 0 observational studies make up this index (100% interventional). Study type is sponsor-reported on ClinicalTrials.gov.
Open and recent trials
6 total, page 1 of 1
Influenza Immunization in Adults Over Age 75
Johns Hopkins University
NCT02200276
Comparing Immune Response of 2 vs 3 HPV Doses (27-45 Years Old)
The University of Texas Medical Branch, Galveston
NCT05672927
Adjuvant Effect of Physical Exercise on Immune Response to COVID-19 Vaccination and Interactions With Stress
Iowa State University
NCT05213000
GARDASIL 9: 3 Dose vs. 2 Dose With Delayed 3rd Dose
The University of Texas Medical Branch, Galveston
NCT03943875
State Immunization Information Systems to Improve HPV Vaccination Rates
University of Colorado, Denver
NCT02993965
The STOP-HPV Trial 2: Performance Feedback Intervention
University of California, Los Angeles
NCT03599570
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 4 | 2 |
Top Sponsors
Named interventions
Most-linked intervention names on Immunization records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Immunization trials. A trial with sites in several states counts in each.
Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.
Related
What to do with this Immunization page
6 registered trials, 3 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 3 Immunization trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- The University of Texas Medical Branch, Galveston sponsors the most Immunization trials on record, review their full trial history before evaluating a specific study. See The University of Texas Medical Branch, Galveston's trials
- Bring the specific trial ID (NCT number) to your own doctor before enrolling, this page is a directory, not medical guidance. Read the trial-finding guide
Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.
Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This Immunization condition card totals 6 registered trials; most-linked intervention 9-valent HPV vaccine, 3 doses standard timing; top US site state Texas. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.