Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Vaccine: early-phase trial registry
2 of 7 indexed Vaccine trials are currently recruiting, with more weight in Phase 1-2.
Corpus placement: #2,497 of 28,707 conditions by registered trial count.
7 US clinical trials · 2 currently recruiting · #2,497 of 28,707 conditions by registered trial count
Vaccine: 7 US clinical trials tracked, 2 recruiting.
Vaccine is the subject of 7 registered US clinical trials on ClinicalTrials.gov, 2 of them currently open to new participants. 1 are in Phase 3-4 (later-stage) and 3 in Phase 1-2 (earlier-stage). The most active sponsor is HDT Bio, running 1 of these trials.
Enrollment posture brief
Registry condition vaccine
OPEN 2 | RECR 29% | LATE 1 | EARLY 3 | RANK #2497 | SPON 1
Volume-matched condition peers
Nearest open-share peer: Acromegaly (29% recruiting · 14 trials)
Vaccine lists 2 open slots (29% of 7 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 Vaccine 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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Vaccine is recruiting below its size-band peers.
2 of 7 indexed trials (28.6%) 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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Sponsorship of Vaccine trials is spread across many organizations.
HDT Bio accounts for 1 of 7 trials (14.3%). 7 distinct sponsors appear on at least one study for this condition label.
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Typical Vaccine enrolment sits around 90 participants.
Median target enrolment is 90 among the 7 trials that report a genuine target (sentinel values excluded). 4 of those (57.1%) plan for fewer than 100 participants.
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Vaccine research is mostly interventional.
7 interventional and 0 observational studies make up this index (100% interventional). Study type is sponsor-reported on ClinicalTrials.gov.
Open and recent trials
7 total, page 1 of 1
Connecting Friends and Health Workers to Boost COVID-19 Vaccination in Latino Communities
Johns Hopkins University
NCT06128928
Safety and Immunogenicity of a Self-Amplifying RNA Vaccine Against Crimean-Congo Hemorrhagic Fever
HDT Bio
NCT06799013
Induction of Gut Permeability by an Oral Vaccine
USDA, Western Human Nutrition Research Center
NCT04083950
State Immunization Information Systems to Improve HPV Vaccination Rates
University of Colorado, Denver
NCT02993965
HPV Message Testing and Social Media Campaign
Dartmouth-Hitchcock Medical Center
NCT03747302
Trial to Evaluate the Safety and Immunogenicity of a Modified Vaccinia Ankara (MVA)-Based Anti-Cytomegalovirus (CMV) Vaccine (Triplex®)
National Institute of Allergy and Infectious Diseases (NIAID)
NCT05099965
PFAS Exposure and Immune Response to Vaccination in Adults
Rutgers, The State University of New Jersey
NCT06588530
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 2 |
| Phase 2 | 1 |
| Phase 4 | 1 |
Top Sponsors
Named interventions
Most-linked intervention names on Vaccine records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Vaccine 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 Vaccine page
7 registered trials, 2 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 2 Vaccine trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- HDT Bio sponsors the most Vaccine trials on record, review their full trial history before evaluating a specific study. See HDT Bio'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 Vaccine condition card totals 7 registered trials; most-linked intervention Social media message about risk of electronic cigarettes.; top US site state Texas. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.