A Study to Evaluate the Safety and Immunogenicity of IVX-A12 in Participants of 60 to 85 Years of Age
Public ClinicalTrials.gov record NCT05903183. 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 2a Randomized, Observer-blind, Placebo-controlled, Dosage Optimization, Multi-center Clinical Trial to Evaluate the Safety and Immunogenicity of IVX-A12, a Respiratory Syncytial Virus and Human Metapneumovirus Bivalent Combination Virus-like Particle Protein Subunit Vaccine, in Adults 60 to 85 Years of Age
Study identification
- NCT ID
- NCT05903183
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 2
- Lead sponsor
- Icosavax, Inc.
- Industry
- Enrollment
- 264 participants
Conditions and interventions
Conditions
Interventions
- IVX-A12 Biological
- Placebo Biological
Biological
Eligibility (public fields only)
- Age range
- 60 Years to 85 Years
- 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
- May 14, 2023
- Primary completion
- Jun 4, 2023
- Completion
- Oct 24, 2024
- Last update posted
- Dec 4, 2025
2023 – 2024
United States locations
- U.S. sites
- 10
- U.S. states
- 9
- U.S. cities
- 10
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| AMR Phoenix | Tempe | Arizona | 85281 | — |
| Cenexel RCA | Hollywood | Florida | 33024 | — |
| Clinical Research Atlanta | Stockbridge | Georgia | 30281 | — |
| Velocity Clinical Research-Boise | Meridian | Idaho | 83642 | — |
| ASR, LLC | Nampa | Idaho | 83587 | — |
| Johnson City Clin-Trials (JCCT) | Lenexa | Kansas | 66219 | — |
| AMR Lexington | Lexington | Kentucky | 40509 | — |
| Velocity Clinical Research | Omaha | Nebraska | 68134 | — |
| Rochester Clinical Research, Inc | Rochester | New York | 14609 | — |
| PanAmerican Clinical Research | Brownsville | Texas | 78520 | — |
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 NCT05903183, 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 Dec 4, 2025 · Synced Jul 22, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT05903183 live on ClinicalTrials.gov.