A Study to Evaluate the Safety, Tolerability and Immunogenicity of an Investigational RSV Vaccine Candidate (Ad26.RSV.preF) in Adults 18 to 50 Years of Age, and RSV-seropositive Toddlers 12 to 24 Months of Age

May 22, 2025 updated by: Janssen Vaccines & Prevention B.V.

A Randomized, Double-blind, Phase 1/2a Study to Evaluate the Safety, Tolerability and Immunogenicity of Ad26.RSV.preF in Adults 18 to 50 Years of Age, RSV-seropositive Toddlers 12 to 24 Months of Age

The purpose of this study is to assess the safety and tolerability of an intramuscular regimen of two doses (1*10^11 viral particles [vp]) of an investigational respiratory syncytial virus (RSV) vaccine candidate (adenovirus serotype 26 respiratory syncytial virus pre-fusion conformation stabilized F protein [pre-F] [Ad26.RSV.preF]) in adults aged 18 to 50 years and RSV-seropositive toddlers aged 12 to 24 months.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

The study, designed to assess the safety and tolerability of two doses given one month apart of Ad26.RSV.preF, an investigational RSV vaccine candidate based on a Ad26 vector expressing the RSV F protein, will be conducted in a double blinded manner. The study will be divided in two sequential cohorts: cohort 0 (18-50 year-old adults) and cohort 1 (12-24 month-old RSV seropositive toddlers). The vaccine safety will be monitored by reporting solicited and unsolicited adverse events (AEs) and all serious adverse events (SAEs). The data will be reviewed by an independent data monitoring committee (IDMC) to assess safety data and to ensure the continuing safety of the participants enrolled in this study. The safety will be monitored throughout the study.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
48

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Finland
      • Järvenpää, Finland, 04400
        • Järvenpään Rokotetutkimusklinikka
      • Tampere, Finland, 33100
        • University of Tampere/Vaccine Research Center
      • Turku, Finland, 20520
        • University of Tampere/Vaccine Research Center
  • United Kingdom
      • Manchester, United Kingdom, M13 9WL
        • Royal Manchester Children's Hospital
      • Oxford, United Kingdom, OX3 7LE
        • Oxford Vaccine Group
      • Southampton, United Kingdom, SO166YD
        • University Hospital Southampton NHS Foundation Trust
  • United States
    • Kansas
      • Newton, Kansas, United States, 67114
        • Heartland Research Associates, LLC

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

2 years to 46 years (Child, Adult)

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

Adults Participants:

  • Participant must be in good health, without significant medical illness, on the basis of physical examination, medical history, and vital signs measurement
  • Participant must be healthy on the basis of clinical laboratory tests performed at screening. If the results of the laboratory screening tests are outside the local laboratory normal reference ranges and additionally within the limits of toxicity Grade 1 according to the United stated (US) Food and Drug Administration (FDA) toxicity tables, the participant may be included only if the investigator judges the abnormalities or deviations from normal to be not clinically significant and appropriate and reasonable for the population under study. This determination must be recorded in the participant's source documents and initialed by the investigator
  • All women of childbearing potential must have a negative highly sensitive serum beta-human chorionic gonadotropin (Beta-hCG) pregnancy test at screening and a negative urine Beta-hCG pregnancy test immediately prior to each study vaccine administration

Pediatric Participants:

  • Participant is the product of a normal term pregnancy greater than and equal to (>=) 37 weeks, with a minimum birth weight of 2.5 kilogram (kg)
  • Participants must be in good health without any significant medical illness on the basis of physical examination, medical history, and vital signs performed at screening

Exclusion Criteria:

Adults Participants:

  • Participant has acute illness (this does not include minor illnesses such as diarrhea) or temperature >=38.0 ºC (degree celsius)/100.4 °F (fahrenheit) within 24 hours prior to the first dose of study vaccine
  • Participant has a history of an underlying clinically significant acute or chronic medical condition or physical examination findings for which, in the opinion of the investigator, participation would not be in the best interest of the participant (example, compromise the well-being) or that could prevent, limit, or confound the protocol-specified assessments
  • Participant has history of malignancy within 5 years before screening (exceptions are squamous and basal cell carcinomas of the skin and carcinoma in situ of the cervix, or malignancy, which is considered cured with minimal risk of recurrence)

Pediatric Participants:

  • Participant's weight is below 10th percentile according to World Health Organization (WHO) pediatric growth and weight charts
  • Participant has any clinically significant acute or chronic medical condition that, in the opinion of the investigator, would preclude participation: example, history of seizure disorders, bleeding/clotting disorder, autoimmune disease, active malignancy, systemic infections, congenital heart disease, history of any pulmonary condition requiring medication, atopy, reactive airway disease, medically-confirmed wheezing, bronchoconstriction or treatment with a beta2 agonist, cystic fibrosis, bronchopulmonary dysplasia, chronic pulmonary disease, medically-confirmed apnea, hospitalization for respiratory illness, or mechanical ventilation for respiratory illness

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Other
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Cohort 0: Adults (Ad26.RSV.preF)
Participants aged greater than or equal to (>=) 18 to lesser than or equal to (<=) 50 years will receive vector Ad26.RSV.preF at 1*10^11 viral particles (vp) via intramuscular (IM) route (Group 1) on Day 1 and 29.
Biological: Ad26.RSV.preF (1*10^11 vp)
Participants will receive two doses of 0.5 milliliter (mL) (1*10^11 vp) via IM route on Day 1 and 29 of Ad26.RSV.preF.
Other Names:
  • JNJ-64400141
Placebo Comparator: Cohort 0: Adults (Placebo)
Participants aged >= 18 to <= 50 years will receive placebo via IM route (Group 2) on Day 1 and 29.
Drug: Placebo
Participants will receive either 0.5 mL (cohort 0) or 0.25 mL (cohort 1) of placebo via IM route on Day 1 and 29.
Experimental: Cohort 1: RSV seropositive Toddlers (Ad26.RSV.preF)
RSV seropositive participants aged >=12 to <=24 months will receive Ad26.RSV.preF at 5*10^10 vp via IM route (Group 3) on Day 1 and 29.
Biological: Ad26.RSV.preF (5*10^10 vp)
RSV seropositive participants will receive two doses of 0.25 mL (5*10^10 vp) via IM route on Day 1 and 29 of Ad26.RSV.preF.
Other Names:
  • JNJ-64400141
Placebo Comparator: Cohort 1: RSV seropositive Toddlers (Placebo)
RSV seropositive participants aged >= 12 to <= 24 months will receive placebo via IM route (Group 4) on Day 1 and 29.
Drug: Placebo
Participants will receive either 0.5 mL (cohort 0) or 0.25 mL (cohort 1) of placebo via IM route on Day 1 and 29.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Number of Participants With Solicited Local Adverse Events (AEs) for 7 Days After First Vaccination
Time Frame: For 7 days after first vaccination on Day 1 (Up to Day 7)
An AE is any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with study vaccine. Solicited local AEs were precisely defined events that participants were specifically asked about and which were noted by participants in the diary. Solicited local AEs included erythema, swelling/induration, and pain/tenderness.
For 7 days after first vaccination on Day 1 (Up to Day 7)
Number of Participants With Solicited Local Adverse Events (AEs) for 7 Days After Second Vaccination
Time Frame: For 7 days after second vaccination on Day 29 (Up to Day 35)
An AE is any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with study vaccine. Solicited local AEs were precisely defined events that participants were specifically asked about and which were noted by participants in the diary. Solicited local AEs included erythema, swelling/induration, and pain/tenderness.
For 7 days after second vaccination on Day 29 (Up to Day 35)
Number of Participants With Solicited Systemic Adverse Events for 7 Days After First Vaccination
Time Frame: For 7 days after first vaccination on Day 1 (Up to Day 7)
An AE is any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with study vaccine. Solicited systemic AEs included were for adult participants: fatigue, headache, myalgia, arthralgia, chills, nausea and fever (defined as body temperature >=38 degree celsius [°C]; for pediatric participants: loss of appetite, vomiting, diarrhea, decreased activity/lethargy, irritability/crying and fever (i.e., body temperature >=38 °C).
For 7 days after first vaccination on Day 1 (Up to Day 7)
Number of Participants With Solicited Systemic Adverse Events for 7 Days After Second Vaccination
Time Frame: For 7 days after second vaccination on Day 29 (Up to Day 35)
An AE is any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with study vaccine. Solicited systemic AEs included were for adult participants: fatigue, headache, myalgia, arthralgia, chills, nausea and fever (defined as body temperature >=38 degree celsius [°C]; for pediatric participants: loss of appetite, vomiting, diarrhea, decreased activity/lethargy, irritability/crying and fever (i.e., body temperature >=38 °C).
For 7 days after second vaccination on Day 29 (Up to Day 35)
Number of Participants With Unsolicited Adverse Events for 28 Days After First Vaccination
Time Frame: For 28 days after first vaccination on Day 1 (Up to Day 28)
An AE is any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with study vaccine. Unsolicited adverse events included all adverse events for which the participant is not specifically questioned in the participant diary.
For 28 days after first vaccination on Day 1 (Up to Day 28)
Number of Participants With Unsolicited Adverse Events for 28 Days After Second Vaccination
Time Frame: For 28 days after second vaccination on Day 29 (Up to Day 56)
An AE is any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with study vaccine. Unsolicited adverse events included all adverse events for which the participant is not specifically questioned in the participant diary.
For 28 days after second vaccination on Day 29 (Up to Day 56)
Number of Participants With Serious Adverse Events (SAEs)
Time Frame: From Day 1 (post-vaccination) to end of the study (up to 2 years 4 months)
An AE is any untoward medical occurrence in a clinical study participant administered a medicinal (investigational or non-investigational) product. An AE does not necessarily have a causal relationship with study vaccine. SAE is any untoward medical occurrence that at any dose may result in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect, is a suspected transmission of any infectious agent via a medicinal product.
From Day 1 (post-vaccination) to end of the study (up to 2 years 4 months)

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Respiratory Syncytial Virus (RSV) A2 Strain Neutralization Antibody Titers at Days 1, 29, 57 and 211
Time Frame: Day 1 (predose), Post-dose on Days 29, 57 and 211
RSV A2 strain neutralizing antibody titers of the vaccine-induced immune response was assessed through virus neutralization assay.
Day 1 (predose), Post-dose on Days 29, 57 and 211
Pre-Fusion RSV Fusion Protein (F-protein) Geometric Mean Titers (GMTs) as Assessed by Enzyme-linked Immunosorbent Assay (ELISA) at Days 1, 29, 57 and 211
Time Frame: Pre-fusion on Days 1, 29, 57 and 211
GMT (ELISA units per liter [EU/L]) of RSV F protein in pre-fusion form as assessed by ELISA was reported.
Pre-fusion on Days 1, 29, 57 and 211
Post-Fusion RSV Fusion Protein (F-protein) Geometric Mean Titers (GMTs) as Assessed by ELISA at Days 1, 29, 57 and 211
Time Frame: Post-fusion on Days 1, 29, 57 and 211
GMT (ELISA units per liter [EU/L]) of RSV F protein in post-fusion form as assessed by ELISA was reported.
Post-fusion on Days 1, 29, 57 and 211
Percentage of Cytokine Subsets (CD4, CD8, Th1 and Th2 Cytokines) to Evaluate Total Cytokine Response at Days 1, 29 and 57
Time Frame: Day 1 (predose) and Post-dose on Days, 29, and 57
Total cytokine response (CD4, CD8, Th1 and Th2 Cytokines) after in vitro RSV F protein peptide stimulation was reported as the percentage of CD4+ and CD8+ T cells that produce at least 1 of 3 cytokines.
Day 1 (predose) and Post-dose on Days, 29, and 57

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Janssen Vaccines & Prevention B.V.

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Janssen Vaccines & Prevention B.V. Clinical Trial, Janssen Vaccines & Prevention B.V.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
November 29, 2017

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
April 21, 2020

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
April 21, 2020

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
October 3, 2017

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 3, 2017

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
October 6, 2017

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
May 25, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 22, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
May 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • CR108371
  • 2017-001345-27 (EudraCT Number)
  • VAC18194RSV2001 (Other Identifier: Janssen Vaccines & Prevention B.V.)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

The data sharing policy of the Janssen Pharmaceutical Companies of Johnson & Johnson is available at www.janssen.com/clinical trials/transparency. As noted on this site, requests for access to the study data can be submitted through Yale Open Data Access (YODA) Project site at yoda.yale.edu

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

Yes

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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Medical Conditions

Drug Interventions

Conditions

Rare Diseases

Drug Interventions

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