Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Influenza Immunization: early-phase trial registry
A small indexed set (4 trials) with no open enrollment listed right now.
Corpus placement: #4,115 of 28,707 conditions by registered trial count.
4 US clinical trials · none currently recruiting · #4,115 of 28,707 conditions by registered trial count
Influenza Immunization: 4 US clinical trials tracked, none currently recruiting.
Influenza Immunization is the subject of 4 registered US clinical trials on ClinicalTrials.gov, none currently recruiting. 1 are in Phase 3-4 (later-stage) and 3 in Phase 1-2 (earlier-stage). The most active sponsor is Sanofi Pasteur, a Sanofi Company, running 2 of these trials.
Enrollment posture brief
Registry condition influenza-immunization
OPEN 0 | RECR 0% | LATE 1 | EARLY 3 | RANK #4115 | SPON 2
Volume-matched condition peers
Nearest open-share peer: Accelerated Phase Chronic Myelogenous Leukemia (0% recruiting · 12 trials)
Influenza Immunization has no open enrollment in this registry pull (4 archived studies). Peers show how other volume-matched labels compare on open share. How peer matching works →
Key findings
What ClinicalTrials.gov does not surface for Influenza 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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Influenza Immunization is recruiting below its size-band peers.
0 of 4 indexed trials (0%) 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.
Indexed trials (enrollment closed)
4 total, page 1 of 1
Study of a Combination Vaccine Comprised of Different Recombinant Spike Antigen Levels of a Matrix-M Adjuvanted Recombinant COVID-19 Vaccine and High-Dose Inactivated Influenza Vaccine in Adult Participants 50 Years of Age and Older
Sanofi
NCT06695117
Study of a Combination Vaccine Comprised of Different Recombinant Spike Antigen Levels of a Matrix-M Adjuvanted Recombinant COVID-19 Vaccine and Recombinant Influenza Vaccine in Adult Participants 50 Years of Age and Older
Sanofi
NCT06695130
Study to Evaluate Safety and Immunogenicity of a Pandemic Flu H5 mRNA Vaccine in Healthy Adults Aged 18 Years and Older
Sanofi Pasteur, a Sanofi Company
NCT06727058
Annual Study for Collection of Serum Samples in Children and Older Adults Receiving the 2021-2022 Formulations of Fluzone Quadrivalent Vaccine and Fluzone High-Dose Quadrivalent Vaccine, Respectively
Sanofi Pasteur, a Sanofi Company
NCT05050318
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 3 |
| Phase 4 | 1 |
Top Sponsors
Named interventions
Most-linked intervention names on Influenza Immunization records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Influenza 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 Influenza Immunization page
4 registered trials, 0 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- No Influenza Immunization trials are currently recruiting in this registry; that can change as new trials post, or check the broader research index. Browse research indexes
- Sanofi Pasteur, a Sanofi Company sponsors the most Influenza Immunization trials on record, review their full trial history before evaluating a specific study. See Sanofi Pasteur, a Sanofi Company'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 Influenza Immunization condition card totals 4 registered trials; most-linked intervention rC19 (dose 1); top US site state Utah. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.