Completed
PHASE3
INTERVENTIONAL
NCT04908683
A Study of an Adenovirus Serotype 26 Pre-fusion Conformation-stabilized F Protein (Ad26. RSV. preF) Based Respiratory Syncytial Virus (RSV) Vaccine in the Prevention of Lower Respiratory Tract Disease in Adults Aged 60 Years and Older
View on ClinicalTrials.gov
Updated Dec 15, 2025
Brief Summary
The study will enroll up to 27,200 participants in order to demonstrate the efficacy of the active Ad26.RSV.preF-based study vaccine in the prevention of Reverse Transcription Polymerase Chain Reaction (RT-PCR) confirmed Respiratory Syncytial Virus (RSV)-mediated Lower Respiratory Tract Disease (LRTD) when compared to placebo in adults aged 60 years and above.
Interventions
Name:
Adenovirus serotype 26 (Ad26)-based respiratory syncytial virus (RSV). preF
Type:
BIOLOGICAL
Description:
Participants will receive a single IM injection of an RSV vaccine.
Name:
Placebo
Type:
BIOLOGICAL
Description:
Participants will receive a single IM injection of matching placebo.
Primary Outcomes
Measure:
Number of Participants With First Occurrence of Reverse Transcriptase Polymerase Chain Reaction (RT-PCR)-Confirmed Respiratory Syncytial Virus (RSV) Mediated Lower Respiratory Tract Disease (LRTD)
TimeFrame:
From Baseline (Day 1) up to 12 months
Description:
Number of participants with first occurrence of RT-PCR-confirmed RSV mediated LRTD according to protocol defined criteria were reported. A participant was considered to have RT-PCR-confirmed RSV-mediated LRTD if the following criteria were met: new onset or worsening from baseline of 3 or more of the symptoms as captured on the respiratory infection intensity and impact questionnaire (RiiQ, version 2) at the same assessment time point: cough, short of breath, coughing up phlegm (sputum), and wheezing and confirmation of RSV by RT-PCR in one or more of the nasal swabs, or in the sputum sample. RiiQ symptom scale was a 13-item questionnaire rated on a 4-point scale. Each symptom was rated on a scale of 0 to 3 where 0=None, 1=Mild, 2=Moderate, and 3=Severe. Higher scores indicated greater severity. The total LRTD symptom score was calculated as the mean of the 4 lower respiratory scores (cough, short of breath, coughing up phlegm \[sputum\] and wheezing).
Trial Information
NCT ID
NCT04908683
Status
Completed
Study Type
INTERVENTIONAL
Phases
PHASE3
Sponsor
Janssen Vaccines & Prevention B.V.
Last Updated
December 15, 2025