31-valent pneumococcal conjugate vaccine is named as a drug or biological intervention in 3 clinical trials in our USA trial register, none of which are currently recruiting. The lead sponsor is Vaxcyte, Inc.. Registered phase: Phase 3. Conditions studied include Pneumococcal Vaccines.
| NCT ID | Study | Phase | Status |
|---|---|---|---|
| NCT07284654 | Safety, Tolerability, and Immunogenicity of VAX-31 in Adults ≥50 Years With Immunobridging to Adults 18-49 (ClinicalTrials.gov ↗) Pneumococcal Vaccines |
Phase 3 | Active, closed |
| NCT07365826 | A Clinical Study to Evaluate the Safety, Tolerability, and Immunogenicity of VAX-31 With Influenza Vaccine in Adults ≥ 50 Years of Age (ClinicalTrials.gov ↗) Pneumococcal Vaccines |
Phase 3 | Active, closed |
| NCT07425392 | Safety, Tolerability, and Immunogenicity of VAX-31 in Adults ≥50 Years With Prior Pneumococcal Vaccination (ClinicalTrials.gov ↗) Pneumococcal Vaccines |
Phase 3 | Active, closed |
Registers list studies that are recruiting, about to open, active but closed to enrolment, or enrolling by invitation. The UK and USA registers cover industry-sponsored studies only. Trial titles and statuses are copied from the registry as published.
| Condition (as registered) | Trials |
|---|---|
| Pneumococcal Vaccines | 3 |
| Lead sponsor | Trials |
|---|---|
| Vaxcyte, Inc. | 3 |
| Register | 31-valent pneumococcal conjugate vaccine trials |
|---|---|
| Clinical trials in USA | 3 |
A trial with sites in more than one country appears in each of those registers.
Everything on this page is copied from public ClinicalTrials.gov registry records — it is not written from memory, and nothing here describes how 31-valent pneumococcal conjugate vaccine works or whether it is effective. Each trial links to its own record so you can check it yourself.
This page is built automatically: a daily sync job reads the registry records behind our country trial registers, collects every trial that lists 31-valent pneumococcal conjugate vaccine (or a registered synonym) as a drug or biological intervention, and tabulates the registry fields directly. Placebos and generic comparators are excluded. There is no AI drafting and no per-compound editorial pass, and the page has not been clinically reviewed. The “last verified” date above is the timestamp of that sync, not a review date. Our general editorial approach is described in our editorial standards and corrections policy. The ClinicalTrials.gov data on this page was last retrieved on 24 Sep 2026.