A Clinical Study to Evaluate the Safety, Tolerability, and Immunogenicity of VAX-31 With Influenza Vaccine in Adults ≥ 50 Years of Age
Public ClinicalTrials.gov record NCT07365826. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
A Phase 3, Randomized, Double-Blind, Placebo-Controlled Clinical Study to Evaluate the Safety, Tolerability, and Immunogenicity of VAX-31 Concomitantly Administered With Seasonal Influenza Vaccine in Healthy Subjects 50 Years of Age and Older
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This is a Phase 3, randomized, double-blind study to evaluate the safety and immunogenicity of VAX-31 and seasonal influenza vaccine in pneumococcal-naïve adults ≥ 50 years when the two vaccines are administered at the same visit or separately.
Study identification
- NCT ID
- NCT07365826
- Recruitment status
- Active, not recruiting
- Study type
- Interventional
- Phase
- Phase 3
- Enrollment
- 1,390 participants
Conditions and interventions
Conditions
Interventions
- 31-valent pneumococcal conjugate vaccine Biological
- Seasonal Influenza Vaccine (SIV) (Flublok) Biological
- Placebo Biological
Biological
Eligibility (public fields only)
- Age range
- 50 Years and older
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jan 12, 2026 (Actual)
- Primary completion
- Mar 2027 (Estimated)
- Completion
- Mar 2027 (Estimated)
- Last update posted
- Jun 30, 2026
2026 – 2027
United States locations
- U.S. sites
- 25
- U.S. states
- 15
- U.S. cities
- 25
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Hope Research Institute | Phoenix | Arizona | 85032 | — |
| Tekton Research at Fort Collins | Fort Collins | Colorado | 80525 | — |
| University Clinical Research - Deland | DeLand | Florida | 32720-0834 | — |
| CenExel Research Centers of America | Hollywood | Florida | 33024 | — |
| Health Awareness | Jupiter | Florida | 33458 | — |
| Accel Research Sites - Lakeland | Lakeland | Florida | 33803 | — |
| Accel Research Sites - Largo | Largo | Florida | 33777 | — |
| Precision Clinical Research | Sunrise | Florida | 33351 | — |
| Velocity Valparaiso | Valparaiso | Indiana | 46383 | — |
| Johnson County ClinTrials | Lenexa | Kansas | 66219 | — |
| AMR Lexington | Lexington | Kentucky | 40509 | — |
| DM Clinical Research - Detroit | Detroit | Michigan | 48076 | — |
| Velocity Omaha | Omaha | Nebraska | 68134 | — |
| Rochester Clinical Research | Rochester | New York | 14609 | — |
| CTI Clinical Research Center | Cincinnati | Ohio | 45212 | — |
| Coastal Carolina Research Center | North Charleston | South Carolina | 29405 | — |
| DelRicht Research - Hendersonville | Hendersonville | Tennessee | 37075 | — |
| AMR Knxoville | Knoxville | Tennessee | 37909 | — |
| Tekton Research at Austin | Austin | Texas | 78745 | — |
| REX Clinical Trials | Beaumont | Texas | 77701 | — |
| Epic Medical Research | DeSoto | Texas | 75115 | — |
| CenExel JBR Clinical Research | Salt Lake City | Utah | 84107 | — |
| Charlottesville Medical Research Center | Charlottesville | Virginia | 22911 | — |
| Health Research of Hampton Roads, Inc. | Newport News | Virginia | 23606 | — |
| Clinical Research Partners, LLC. | Richmond | Virginia | 23226 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT07365826, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jun 30, 2026 · Synced Oct 17, 2026
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Open the official record
The complete public registry record, listed eligibility criteria, and available contact information for NCT07365826 live on ClinicalTrials.gov.