The purpose of this study for: Cohort 1 and Cohort 2: to assess the safety and reactogenicity of the intramuscular one- and two-dose regimens, with a booster at Month 12 (Cohort 1) and to select a regimen for Cohort 3. Cohort 2 and part of Cohort 1: to assess respiratory syncytial virus (RSV) neutralizing antibody levels of the regimens containing RSV pre-fusion (preF) protein compared to the one-dose adenovirus serotype 26 respiratory syncytial virus pre-fusion (Ad26.RSV.preF) regimen. Cohort 3: to assess the safety and reactogenicity of the selected regimen and a booster at Month 12 and/or Month 24.
Age range
60 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
Cohort 1: Number of Participants With Serious Adverse Events (SAEs)
Timeframe: From Day 1 up to Day 730
Cohort 2 (Groups 11-13 and 16-18): Number of Participants With Serious Adverse Events (SAEs)
Timeframe: From Day 1 up to Day 730
Cohort 2 (Groups 14-15): Number of Participants With Serious Adverse Events (SAEs)
Timeframe: From Day 1 up to Day 1095
Cohort 3: Number of Participants With Serious Adverse Events (SAEs)
Timeframe: From Day 1 up to Day 1095
Cohort 1: Number of Participants With Solicited Local (Injection Site) and Systemic AEs at 7 Days Post-vaccination 1
Timeframe: 7 days post-vaccination 1 on Day 1 (Day 8)
Cohort 1: Number of Participants With Solicited Local (Injection Site) and Systemic AEs at 7 Days Post-vaccination 2
Timeframe: 7 days post-vaccination 2 on Day 57 (Day 64)
Cohort 1: Number of Participants With Solicited Local (Injection Site) and Systemic AEs at 7 Days Post-vaccination 3
Timeframe: 7 days post-vaccination 3 on Day 365 (Day 372)
Cohort 2: Number of Participants With Solicited Local (Injection Site) and Systemic AEs at 7 Days Post-vaccination 1
Timeframe: 7 days post-vaccination 1 on Day 1 (Day 8)
Cohort 2: Number of Participants With Solicited Local (Injection Site) and Systemic AEs at 7 Days Post-vaccination 2
Timeframe: 7 days post-vaccination 2 on Day 57 (Day 64)
Cohort 3: Number of Participants With Solicited Local (Injection Site) and Systemic AEs at 7 Days Post-vaccination 1
Timeframe: 7 days post-vaccination 1 on Day 1 (Day 8)
Cohort 3: Number of Participants With Solicited Local (Injection Site) and Systemic AEs at 7 Days Post-vaccination 2
Timeframe: 7 days post-vaccination 2 on Day 365 (Day 372)
Cohort 3: Number of Participants With Solicited Local (Injection Site) and Systemic AEs at 7 Days Post-vaccination 3
Timeframe: 7 days post-vaccination 3 on Day 730 (Day 737)
Cohort 1: Number of Participants With Unsolicited AEs at 28 Days Post-vaccination 1
Timeframe: 28 days post-vaccination 1 on Day 1 (Day 29)
Cohort 1: Number of Participants With Unsolicited AEs at 28 Days Post-vaccination 2
Timeframe: 28 days post-vaccination 2 on Day 57 (Day 85)
Cohort 1: Number of Participants With Unsolicited AEs at 28 Days Post-vaccination 3
Timeframe: 28 days post-vaccination 3 on Day 365 (Day 393)
Cohort 2: Number of Participants With Unsolicited AEs at 28 Days Post-vaccination 1
Timeframe: 28 days post-vaccination 1 on Day 1 (Day 29)
Cohort 2: Number of Participants With Unsolicited AEs at 28 Days Post-vaccination 2
Timeframe: 28 days post-vaccination 2 on Day 57 (Day 85)
Cohort 3: Number of Participants With Unsolicited AEs at 28 Days Post-vaccination 1
Timeframe: 28 days post-vaccination 1 on Day 1 (Day 29)
Cohort 3: Number of Participants With Unsolicited AEs at 28 Days Post-vaccination 2
Timeframe: 28 days post-vaccination 2 on Day 365 (Day 393)
Cohort 3: Number of Participants With Unsolicited AEs at 28 Days Post-vaccination 3
Timeframe: 28 days post-vaccination 3 on Day 730 (Day 758)
Cohort 2 (Group 11 to 15): Respiratory Syncytial Virus (RSV) A2 Strain Neutralization Antibody Titers on Day 29
Timeframe: Day 29