CI

At a glance

ClinicalIndex Comparison Record
Phase 2Completed· 264 enrolled
Drug / intervention
IVX-A12 +2 morebiological
Likely dose
Not stated in record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT05903183
NCT05903183Phase 2Completed

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

Icosavax, Inc.·interventional·Posted Jun 15, 2023·Updated Dec 5, 2025

In Brief

A Phase 2 clinical trial evaluating IVX-A12 and Placebo for Healthy. Completed, enrolled 264 participants across 10 sites.

Detailed Summary

The primary purpose of the study is to assess the safety, tolerability and immunogenicity of a bivalent respiratory syncytial virus (RSV)/human metapneumovirus (hMPV) virus-like particle (VLP) candidate vaccine (IVX-A12) compared to placebo, when administered as a single-dose regimen in healthy older adults 60 to 85 years of age.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
ConditionsHealthy
CountriesUnited States
Collaborators--

Timeline

Phase 2CompletedFinished
202420252026
First PostedJun 15, 2023
Enrollment StartMay 15, 2023
Primary CompletionJun 5, 2023
Study CompletionOct 25, 2024
TodayJul 2, 2026
Enrollment to primary: 20 daysPosted 3.0 years ago

Interventions

IVX-A12biological

IVX-A12 without adjuvant

IVX-A12biological

IVX-A12 with adjuvant

Placebobiological

Diluent