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Vaccination for older adults against respiratory syncytial virus

A Phase 3b, Randomized, Open Label, Multicountry, Multi-center, Extension and Crossover Vaccination Study to Evaluate the Immunogenicity and Safety of Different Revaccination Schedules and Persistence of a Single Dose of the RSVPreF3 OA Vaccine in Adults Aged 60 Years and Above Who Participated in the RSV OA=ADJ-006 Study

Phase 3 Interventional GlaxoSmithKline · NCT06534892

This study tests a new vaccine for respiratory syncytial virus in older adults to see how well it works and how safe it is over several years.

Quick facts

PhasePhase 3
Study typeInterventional
Enrollment15500 (estimated)
Ages60 Years and up
SexAll
SponsorGlaxoSmithKline Industry-sponsored
Drugs / interventionsprednisone
Locations249 sites (Birmingham, Alabama and 248 other locations)
Trial IDNCT06534892 on ClinicalTrials.gov

What this trial studies

This study investigates the immune response and safety of the RSVPreF3 OA vaccine in adults aged 60 and above who previously participated in a related study. It aims to determine the optimal timing for revaccination and assess long-term immune persistence and safety over five RSV seasons. Additionally, it provides an opportunity for participants who received a placebo in the earlier study to receive the vaccine and gather further safety data.

Who should consider this trial

Good fit: Ideal candidates are adults aged 60 and older who previously participated in the RSV OA=ADJ-006 study and received either a placebo or the RSVPreF3 OA vaccine.

Not a fit: Patients with confirmed or suspected immunosuppressive or immunodeficient conditions may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could enhance the protection of older adults against respiratory syncytial virus infections.

How similar studies have performed: Other studies on RSV vaccines have shown promise, indicating potential for success with this approach.

Eligibility criteria

Show full inclusion / exclusion criteria 
Inclusion Criteria:

* Male or female participants who were previously enrolled in the RSV OA=ADJ-006 study and received placebo (Placebo group) or a single dose of the RSVPreF3 OA vaccine (RSV_1dose group).
* Participants who, in the opinion of the investigator, can and will comply with the requirements of the protocol (e.g. completion of the diary cards, attend regular phone calls/study site visits, ability to access and utilize a phone or other electronic communications).
* Written or witnessed informed consent obtained from the participant prior to performance of any study specific procedure.
* Participants who are medically stable in the opinion of the investigator at study entry. Participants with chronic stable medical conditions with or without specific treatment, such as diabetes, hypertension or cardiac disease, are allowed to participate in this study.

Exclusion Criteria:

Medical Conditions:

* Any confirmed or suspected immunosuppressive or immunodeficient condition resulting from disease or immunosuppressive/cytotoxic therapy based on medical history and physical examination.
* History of any reaction or hypersensitivity likely to be exacerbated by any component of the study intervention.
* Hypersensitivity to latex.
* Serious or unstable chronic illness.
* Recurrent or un-controlled neurological disorders or seizures.
* Significant underlying illness that in the opinion of the investigator would be expected to prevent completion of the study.
* Any other medical condition that in the judgment of the investigator would make intramuscular injection unsafe.
* Any other clinical condition that, in the opinion of the investigator, might pose additional risk to the participant due to participation in the study.
* Any history of dementia or any medical condition that moderately or severely impairs cognition and understanding of the informed consent form and/or study procedures.
* Participants who experienced an SAE or pIMD from first study intervention administration in the RSV OA=ADJ-006 study until enrollment in this study that was considered to be possibly or probably related to the study vaccine or non-study concomitant vaccines, either by the investigator or the sponsor, including hypersensitivity reactions.
* Participants with a new onset of a pIMD or exacerbation of a pIMD from first study intervention administration in the RSV OA=ADJ-006 study until enrollment in this study, that, in the opinion of the investigator, exposes the participant to unacceptable risk from subsequent vaccination.

Prior/Concomitant Therapy:

• Use of any investigational or non-registered product other than the study vaccine during the period beginning 30 days before the first dose of study vaccine, or planned use during the study period. • Previous vaccination with an RSV vaccine (investigational or licensed vaccine) and/or planned administration of an RSV vaccine during the study period other than the RSVPreF3 OA vaccine administered during the RSV OA=ADJ-006 study.

Prior/Concurrent Clinical Study Experience:

• Concurrently participating in another clinical study, at any time during the study period, in which the participant has been or will be exposed to an investigational or a non-investigational vaccine/product.

Other Exclusion Criteria:

* History of chronic alcohol consumption and/or drug abuse as deemed by the investigator to render the potential participant unable/unlikely to provide accurate safety reports or comply with study procedures.
* Participation of any study personnel or their immediate dependents, family, or household members.
* Bedridden participants.

Specific exclusion criteria for Crossover group:

• Planned or administration of a vaccine not foreseen by the study protocol in the period starting 30 days before and ending 30 days after study intervention administration, with the exception of COVID vaccines which can be administered up to 14 days before or from 14 days after study vaccination. Inactivated seasonal influenza vaccines can be co-administered or administered at any time.

Specific exclusion criteria for RSV_PreS4, RSV_PreS5 and RSV_1Dose groups:

* Planned or administration of a vaccine not foreseen by the study protocol in the period starting 30 days before and ending 30 days after study intervention administration, with the exception of COVID vaccines and inactivated seasonal influenza vaccines which can be administered up to 14 days before or from 14 days after study intervention administration.
* Administration of long-acting immune-modifying drugs or planned administration at any time during the study period.
* Administration of immunoglobulins and/or any blood products or plasma derivatives during the period starting 90 days before the first study visit or planned administration during the study period.
* Chronic administration of immunosuppressants or other immunemodifying drugs during the period starting 90 days prior to the first study visit or planned administration during the study period. For corticosteroids, this will mean prednisone \>= 20 mg/day, or equivalent. Inhaled and topical steroids are allowed.

Where this trial is running

Birmingham, Alabama and 248 other locations

+199 more sites — see ClinicalTrials.gov for the full list.

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
View on ClinicalTrials.gov → Find more trials like this →
Conditions Respiratory Syncytial Virus InfectionsRespiratory syncytial virusOlder adultsRSVPreF3 OA vaccineImmunogenicitySafetyRSV Season
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.