Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
COVID-19 Vaccine: early-phase trial registry
4 of 7 indexed COVID-19 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 · 4 currently recruiting · #2,497 of 28,707 conditions by registered trial count
COVID-19 Vaccine: 7 US clinical trials tracked, 4 recruiting.
COVID-19 Vaccine is the subject of 7 registered US clinical trials on ClinicalTrials.gov, 4 of them currently open to new participants. 0 are in Phase 3-4 (later-stage) and 2 in Phase 1-2 (earlier-stage). The most active sponsor is Duke University, running 2 of these trials.
Enrollment posture brief
Registry condition covid-19-vaccine
OPEN 4 | RECR 57% | LATE 0 | EARLY 2 | RANK #2497 | SPON 2
Volume-matched condition peers
Nearest open-share peer: Adverse Childhood Experiences (57% recruiting · 14 trials)
COVID-19 Vaccine lists 4 open slots (57% 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 COVID-19 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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COVID-19 Vaccine is recruiting above its size-band peers.
4 of 7 indexed trials (57.1%) 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 COVID-19 Vaccine research.
Duke University accounts for 2 of 7 trials (28.6%). 6 distinct sponsors appear on at least one study for this condition label.
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Typical COVID-19 Vaccine enrolment sits around 75 participants.
Median target enrolment is 75 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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COVID-19 Vaccine splits between interventional and observational designs.
4 interventional and 3 observational studies make up this index (57.1% interventional). Study type is sponsor-reported on ClinicalTrials.gov.
Open and recent trials
7 total, page 1 of 1
COVID-19 Vaccines Safety Tracking (CoVaST)
Masaryk University
NCT04834869
Researchers At UC San Diego Are Learning About the Benefits of Human Milk and How It Influences Infant and Child Health
University of California, San Diego
NCT05553743
SCIVAX: Biomarkers of Immune Dysfunction and Vaccine Responsiveness in Chronic SCI
Northwell Health
NCT05869968
Thymalfasin (Thymosin Alpha 1; Ta1) as an Enhancer of Vaccine Response Among Older Adults Receiving Booster Doses of COVID-19 Vaccine
The Methodist Hospital Research Institute
NCT06821100
Vaccine Hesitancy in Black/African Americans With Rheumatic Diseases
Northwestern University
NCT05822219
Pancoronavirus Vaccine Study in Healthy Adults
Duke University
NCT06950177
COVID-19 Vaccination Hesitancy in Adults With Sickle Cell Disease
Duke University
NCT05998824
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 2 |
Top Sponsors
Named interventions
Most-linked intervention names on COVID-19 Vaccine records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on COVID-19 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 COVID-19 Vaccine page
7 registered trials, 4 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 4 COVID-19 Vaccine trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- Duke University sponsors the most COVID-19 Vaccine trials on record, review their full trial history before evaluating a specific study. See Duke University'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 COVID-19 Vaccine condition card totals 7 registered trials; most-linked intervention SCD-specific COVID-19 vaccination information (SCVI) video; top US site state North Carolina. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.