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Study to Assess the Immune Response, the Safety and the Reactogenicity of Respiratory Syncytial Virus (RSV) Prefusion Protein 3 Older Adult (OA) (RSVPreF3 OA) Investigational Vaccine When co Administered With PCV20 in Older Adults

A Phase III, Open-label, Randomized, Controlled, Multi-Country Study to Evaluate the Immune Response, Safety and Reactogenicity of RSVPreF3 OA Investigational Vaccine When Co Administered With PCV20 in Adults Aged 60\xa0Years and Older

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05879107
Enrollment
1113
Registered
2023-05-30
Start date
2023-05-26
Completion date
2024-05-07
Last updated
2025-05-18

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Respiratory Syncytial Virus Infections

Keywords

Respiratory syncytial virus, Vaccine, Older adult, Immunogenicity, Safety

Brief summary

The purpose of this study is to assess the ability of RSVPreF3 OA investigational vaccine to generate an immune response when given in combination with PCV20 and its safety in older adults, aged ≥60 years of age.

Interventions

One dose of RSVPreF3 OA vaccine given intramuscularly in participant's non-dominant arm on Day 1 (in the Coad group) or Day 31(in the Control group).

BIOLOGICALPCV20

One dose of the 20-valent pneumococcal conjugate vaccine (PCV20) given intramuscularly in participant's dominant arm (Coad group) or non-dominant arm (Control group) on Day 1

Sponsors

GlaxoSmithKline
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
60 Years to No maximum
Healthy volunteers
Yes

Inclusion criteria

* A male or female ≥60 years of age at the time of the first study intervention administration. * Participants who, in the opinion of the investigator, can and will comply with the requirements of the protocol. * Written or witnessed informed consent obtained from the participant prior to any study-specific procedure being performed. * Participants living in the general community or in an assisted-living facility that provides minimal assistance, such that the participant is primarily responsible for self care and activities of daily living. * Participants who are medically stable in the opinion of the investigator at the time of first study intervention administration. Participants with chronic stable medical conditions with or without specific treatment, are allowed to participate in this study if considered by the investigator as medically stable.

Exclusion criteria

* 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 the study interventions, in particular any history of severe allergic reaction to any vaccine containing diphtheria toxoid, or pneumococcal polysaccharide 23-valent vaccine (PPSV23). * Participants considered by investigator as suffering from serious or unstable chronic illness. * Any history of dementia or any medical condition that moderately or severely impairs cognition. * Recurrent or uncontrolled neurological disorders or seizures. Participants with medically controlled active or chronic neurological diseases can be enrolled in the study as per investigator assessment, provided that their condition will allow them to comply with the requirements of the protocol. * Significant underlying illness that in the opinion of the investigator would be expected to prevent completion of the study. * Any medical condition that in the judgment of the investigator would make intramuscular injection unsafe. * History of previous vaccination with any licensed or investigational pneumococcal conjugate vaccine, or planned receipt through study participation. * History of previous vaccination with any licensed or investigational pneumococcal polysaccharide vaccine in the last 5 years from enrollment, or planned receipt through study participation. * Previous vaccination with any licensed or investigational RSV vaccine * Use of any investigational or non-registered product (drug, vaccine or medical device) other than the study interventions during the period beginning 30 days before the first dose of study interventions and ending 30 days after the last study intervention administration, or their planned use during the study period. * Planned or actual administration of a vaccine not foreseen by the study protocol in the period starting 30 days before the first study intervention administration and ending 30 days after the last study intervention administration. In the case of COVID 19 and inactivated/subunit influenza vaccines, this time window can be decreased to 14 days before and after each study intervention administration. In case of COVID-19 vaccine administration within 14 to 30 days window, the administration of COVID-19 vaccine should be in accordance with local government recommendations. * Planned or actual administration of adjuvanted quadrivalent influenza vaccine or live influenza vaccine not foreseen by the study protocol in the period starting 30 days before the first study intervention administration and ending 30 days after the last study intervention administration. Note: In case an emergency mass vaccination for an unforeseen public health threat (e.g., a pandemic) is recommended and/or organized by the public health authorities outside the routine immunization program, the time period described above can be reduced if necessary for that vaccine, provided it is used according to the local governmental recommendations and that the Sponsor or designee is notified accordingly. * 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 administration of first dose of study interventions or planned administration during the study period. * Chronic administration (defined as more than 14 consecutive days in total) of immunosuppressants or other immune-modifying drugs during the period starting 90 days prior to the first study intervention dose or planned administration during the study period. For corticosteroids, this will mean prednisone ≥20 mg/day, or equivalent. Inhaled and topical steroids are allowed. * 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 (drug or invasive medical device). * 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. * Bedridden participants. * Planned move during the study conduct that prohibits participation until EoS. * Participation of any study personnel or their immediate dependents, family, or household members.

Design outcomes

Primary

MeasureTime frameDescription
Adjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationAt Day 31The OP titers were measured with multiplexed opsonophagocytosis assay and the results were expressed as GMT for each of the pneumococcal vaccine serotype.
Adjusted GMTs of Respiratory Syncytial Virus-A (RSV-A) Neutralizing Titers [Estimated Dilution 60 (ED60)] at 1 Month After the RSVPreF3 OA VaccinationAt Day 31 for Co-administration Group and at Day 61 for Control GroupNeutralizing titers were measured with neutralization assay and the results were expressed in ED60.
Adjusted GMTs of RSV-B Neutralizing Titers (ED60) at 1 Month After the RSVPreF3 OA VaccinationAt Day 31 for Co-administration Group and at Day 61 for Control GroupNeutralizing titers were measured with neutralization assay and the results were expressed in ED60.

Secondary

MeasureTime frameDescription
Number of Participants With Solicited Systemic AEs After Each Vaccine Dose AdministrationWithin 7 days (the day of vaccination and 6 subsequent days) after each vaccine administration (vaccines administered at Day 1 for Co-Administration Group and at Days 1 and 31 for Control group)The solicited systemic events after vaccination include fever (pyrexia), headache, fatigue, myalgia and arthralgia. Fever is defined as body temperature \>=38 degree Celsius; preferred location for measuring the temperature is oral.
Number of Participants With Unsolicited AEsWithin 30 days (the day of vaccination and 29 subsequent days) after each vaccine administration (vaccines administered at Day 1 for Co-Administration Group and at Days 1 and 31 for Control group)An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the administration of a study vaccine, which does not necessarily have a causal relationship with study vaccine. An unsolicited AE is an AE that is either not included in the list of solicited events or could be included in the list of solicited events but with an onset outside the specified period of follow-up for solicited events. Unsolicited AEs are communicated by participant/participant's caregiver(s) who have signed the informed consent. Unsolicited AEs include both serious adverse events (SAEs) and non-serious AEs.
Mean Geometric Increase (MGI) of RSV-A Neutralizing Titers at 1 Month After the RSVPreF3 OA VaccinationAt 1 month after the RSVPreF3 OA vaccine dose (Day 31 for Co-administration Group and Day 61 for Control Group) compared to Pre-vaccination (Day 1 for Co-administration Group and Day 31 for Control Group)The MGI was defined as the geometric mean increase of the within participant ratios of the post-vaccination titer over the pre-vaccination titer. Neutralizing titers were measured with neutralization assay.
Number of Participants With Potential Immune-mediated Diseases (pIMDs)Throughout the study period (from Day 1 up to 6 months after the last dose administration [last dose given at Day 1 for Co-administration Group and Day 31 for Control Group])The pIMD is a subset of AEs of special interest that include autoimmune diseases and other inflammatory and/or neurologic disorders of interest which may or may not have an autoimmune etiology.
Number of Participants With SAEsThroughout the study period (from Day 1 up to 6 months after the last dose administration [last dose given at Day 1 for Co-administration Group and Day 31 for Control Group])An SAE is defined as any untoward medical occurrence that results 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, or is an important medical event.
MGI of RSV-B Neutralizing Titers at 1 Month After the RSVPreF3 OA VaccinationAt 1 month after the RSVPreF3 OA vaccine dose (Day 31 for Co-administration Group and Day 61 for Control Group) compared to Pre-vaccination (Day 1 for Co-administration Group and Day 31 for Control Group)The MGI was defined as the geometric mean increase of the within participant ratios of the post-vaccination titer over the pre-vaccination titer. Neutralizing titers were measured with neutralization assay.
Number of Participants With Solicited Administration Site Adverse Events (AEs) After Each Vaccine Dose AdministrationWithin 7 days (the day of vaccination and 6 subsequent days) after each vaccine administration (vaccines administered at Day 1 for Co-Administration Group and at Days 1 and 31 for Control group)The solicited administration site events after vaccination include pain, erythema/redness, and swelling.

Countries

Belgium, Poland, Spain, United States

Participant flow

Recruitment details

This study was conducted in adult participants aged 60 years and older, in 38 study sites.

Pre-assignment details

Out of 1113 participants, a total of 1110 were eligible and were randomized in a 1:1 ratio to either co-administration group or control group at Day 1.

Participants by arm

ArmCount
Co-administration Group
Participants received both RSVPreF3 OA vaccine and PCV20 on Day 1.
553
Control Group
Participants received PCV20 vaccine on Day 1 and RSVPreF3 OA vaccine on Day 31.
557
Total1,110

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyDeath02
Overall StudyLost to Follow-up813
Overall StudyMigrated / moved from the study area11
Overall StudyOther03
Overall StudyWithdrawal by participant, not due to an adverse event57

Baseline characteristics

CharacteristicCo-administration GroupControl GroupTotal
Age, Continuous69.6 years
STANDARD_DEVIATION 7.28
69.6 years
STANDARD_DEVIATION 7.41
69.6 years
STANDARD_DEVIATION 7.35
Race/Ethnicity, Customized
All Other Races
7 Participants7 Participants14 Participants
Race/Ethnicity, Customized
Black or African American
64 Participants54 Participants118 Participants
Race/Ethnicity, Customized
Multiple
2 Participants4 Participants6 Participants
Race/Ethnicity, Customized
Other
4 Participants4 Participants8 Participants
Race/Ethnicity, Customized
White
476 Participants488 Participants964 Participants
Sex: Female, Male
Female
316 Participants315 Participants631 Participants
Sex: Female, Male
Male
237 Participants242 Participants479 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
0 / 5532 / 557
other
Total, other adverse events
410 / 553423 / 557
serious
Total, serious adverse events
9 / 55314 / 557

Outcome results

Primary

Adjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 Vaccination

The OP titers were measured with multiplexed opsonophagocytosis assay and the results were expressed as GMT for each of the pneumococcal vaccine serotype.

Time frame: At Day 31

Population: Per protocol set (PPS) for PCV20 included all eligible participants in the exposed set who: received the PVC20 vaccine, had immunogenicity results for OP titers, complied with blood draw interval, without intercurrent medical conditions and without prohibited concomitant medication/vaccination and who did not meet any of the criteria for elimination up to blood sample collection. Only participants with data available at the specified timepoint were included in the analysis.

ArmMeasureGroupValue (GEOMETRIC_MEAN)
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 174.7 Titers
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 388.5 Titers
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 41220.9 Titers
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 5191.0 Titers
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 6A1790.0 Titers
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 6B2121.6 Titers
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 7F2411.3 Titers
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 8522.9 Titers
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 9V937.0 Titers
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 10A6033.4 Titers
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 11A798.0 Titers
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 12F1608.4 Titers
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 142322.3 Titers
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 15B4336.4 Titers
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 18C1148.6 Titers
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 19A1392.3 Titers
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 19F525.6 Titers
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 22F5492.3 Titers
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 23F729.7 Titers
Co-administration GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 33F14902.8 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 22F7351.5 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 1110.8 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 11A944.2 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 3116.2 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 19A1933.8 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 41634.1 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 12F1932.4 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 5260.3 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 33F20920.9 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 6A2458.3 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 143301.4 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 6B2996.9 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 19F696.7 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 7F3225.1 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 15B6350.2 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 8723.0 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 23F995.0 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 9V1161.0 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 18C1480.0 Titers
Control GroupAdjusted Geometric Mean Titers (GMT) of Opsonophagocytic (OP) Titers at 1 Month After the PCV20 VaccinationStrep pneumoniae - serotype 10A7349.4 Titers
Comparison: Strep pneumoniae - serotype 195% CI: [1.22, 1.81]
Comparison: Strep pneumoniae - serotype 395% CI: [1.12, 1.54]
Comparison: Strep pneumoniae - serotype 495% CI: [1.13, 1.58]
Comparison: Strep pneumoniae - serotype 595% CI: [1.08, 1.71]
Comparison: Strep pneumoniae - serotype 6A95% CI: [1.12, 1.69]
Comparison: Strep pneumoniae - serotype 6B95% CI: [1.17, 1.7]
Comparison: Strep pneumoniae - serotype 7F95% CI: [1.16, 1.55]
Comparison: Strep pneumoniae - serotype 895% CI: [1.17, 1.64]
Comparison: Strep pneumoniae - serotype 9V95% CI: [1.05, 1.47]
Comparison: Strep pneumoniae - serotype 10A95% CI: [1.03, 1.44]
Comparison: Strep pneumoniae - serotype 11A95% CI: [0.98, 1.42]
Comparison: Strep pneumoniae - serotype 12F95% CI: [0.99, 1.46]
Comparison: Strep pneumoniae - serotype 1495% CI: [1.21, 1.67]
Comparison: Strep pneumoniae - serotype 15B95% CI: [1.22, 1.76]
Comparison: Strep pneumoniae - serotype 18C95% CI: [1.07, 1.55]
Comparison: Strep pneumoniae - serotype 19A95% CI: [1.2, 1.61]
Comparison: Strep pneumoniae - serotype 19F95% CI: [1.12, 1.57]
Comparison: Strep pneumoniae - serotype 22F95% CI: [1.12, 1.6]
Comparison: Strep pneumoniae - serotype 23F95% CI: [1.09, 1.71]
Comparison: Strep pneumoniae - serotype 33F95% CI: [1.2, 1.64]
Primary

Adjusted GMTs of Respiratory Syncytial Virus-A (RSV-A) Neutralizing Titers [Estimated Dilution 60 (ED60)] at 1 Month After the RSVPreF3 OA Vaccination

Neutralizing titers were measured with neutralization assay and the results were expressed in ED60.

Time frame: At Day 31 for Co-administration Group and at Day 61 for Control Group

Population: PPS for RSVPreF3 OA included all eligible participants in the exposed set who: received the RSVPreF3 OA vaccine, had immunogenicity results for RSV neutralizing titers, complied with blood draw interval, without intercurrent medical conditions and without prohibited concomitant medication/vaccination and who did not meet any of the criteria for elimination up to blood sample collection. Only the participants with RSV-A data at the specified timepoints were included in the analysis.

ArmMeasureValue (GEOMETRIC_MEAN)
Co-administration GroupAdjusted GMTs of Respiratory Syncytial Virus-A (RSV-A) Neutralizing Titers [Estimated Dilution 60 (ED60)] at 1 Month After the RSVPreF3 OA Vaccination8338.2 Titers
Control GroupAdjusted GMTs of Respiratory Syncytial Virus-A (RSV-A) Neutralizing Titers [Estimated Dilution 60 (ED60)] at 1 Month After the RSVPreF3 OA Vaccination8872.7 Titers
Comparison: RSV-A95% CI: [0.94, 1.2]
Primary

Adjusted GMTs of RSV-B Neutralizing Titers (ED60) at 1 Month After the RSVPreF3 OA Vaccination

Neutralizing titers were measured with neutralization assay and the results were expressed in ED60.

Time frame: At Day 31 for Co-administration Group and at Day 61 for Control Group

Population: PPS for RSVPreF3 OA. Only the participants with RSV-B data at the specified timepoints were included in the analysis.

ArmMeasureValue (GEOMETRIC_MEAN)
Co-administration GroupAdjusted GMTs of RSV-B Neutralizing Titers (ED60) at 1 Month After the RSVPreF3 OA Vaccination9477.5 Titers
Control GroupAdjusted GMTs of RSV-B Neutralizing Titers (ED60) at 1 Month After the RSVPreF3 OA Vaccination9497.6 Titers
Comparison: RSV-B95% CI: [0.89, 1.13]
Secondary

Mean Geometric Increase (MGI) of RSV-A Neutralizing Titers at 1 Month After the RSVPreF3 OA Vaccination

The MGI was defined as the geometric mean increase of the within participant ratios of the post-vaccination titer over the pre-vaccination titer. Neutralizing titers were measured with neutralization assay.

Time frame: At 1 month after the RSVPreF3 OA vaccine dose (Day 31 for Co-administration Group and Day 61 for Control Group) compared to Pre-vaccination (Day 1 for Co-administration Group and Day 31 for Control Group)

Population: PPS for RSVPreF3 OA. Only the participants with RSV-A data at the specified timepoints were included in the analysis.

ArmMeasureValue (GEOMETRIC_MEAN)
Co-administration GroupMean Geometric Increase (MGI) of RSV-A Neutralizing Titers at 1 Month After the RSVPreF3 OA Vaccination8.3 Ratio
Control GroupMean Geometric Increase (MGI) of RSV-A Neutralizing Titers at 1 Month After the RSVPreF3 OA Vaccination9.3 Ratio
Secondary

MGI of RSV-B Neutralizing Titers at 1 Month After the RSVPreF3 OA Vaccination

The MGI was defined as the geometric mean increase of the within participant ratios of the post-vaccination titer over the pre-vaccination titer. Neutralizing titers were measured with neutralization assay.

Time frame: At 1 month after the RSVPreF3 OA vaccine dose (Day 31 for Co-administration Group and Day 61 for Control Group) compared to Pre-vaccination (Day 1 for Co-administration Group and Day 31 for Control Group)

Population: PPS for RSVPreF3 OA. Only the participants with RSV-B data at the specified timepoints were included in the analysis.

ArmMeasureValue (GEOMETRIC_MEAN)
Co-administration GroupMGI of RSV-B Neutralizing Titers at 1 Month After the RSVPreF3 OA Vaccination9.4 Ratio
Control GroupMGI of RSV-B Neutralizing Titers at 1 Month After the RSVPreF3 OA Vaccination9.1 Ratio
Secondary

Number of Participants With Potential Immune-mediated Diseases (pIMDs)

The pIMD is a subset of AEs of special interest that include autoimmune diseases and other inflammatory and/or neurologic disorders of interest which may or may not have an autoimmune etiology.

Time frame: Throughout the study period (from Day 1 up to 6 months after the last dose administration [last dose given at Day 1 for Co-administration Group and Day 31 for Control Group])

Population: Exposed set.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Co-administration GroupNumber of Participants With Potential Immune-mediated Diseases (pIMDs)2 Participants
Control GroupNumber of Participants With Potential Immune-mediated Diseases (pIMDs)1 Participants
Secondary

Number of Participants With SAEs

An SAE is defined as any untoward medical occurrence that results 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, or is an important medical event.

Time frame: Throughout the study period (from Day 1 up to 6 months after the last dose administration [last dose given at Day 1 for Co-administration Group and Day 31 for Control Group])

Population: Exposed set.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Co-administration GroupNumber of Participants With SAEs9 Participants
Control GroupNumber of Participants With SAEs14 Participants
Secondary

Number of Participants With Solicited Administration Site Adverse Events (AEs) After Each Vaccine Dose Administration

The solicited administration site events after vaccination include pain, erythema/redness, and swelling.

Time frame: Within 7 days (the day of vaccination and 6 subsequent days) after each vaccine administration (vaccines administered at Day 1 for Co-Administration Group and at Days 1 and 31 for Control group)

Population: Exposed set included all participants in the Enrolled set who received at least 1 study intervention. Only those participants with solicited administration site AEs were included in this analysis.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Co-administration GroupNumber of Participants With Solicited Administration Site Adverse Events (AEs) After Each Vaccine Dose AdministrationPain at injection site, PCV20 dose, given at Day 1283 Participants
Co-administration GroupNumber of Participants With Solicited Administration Site Adverse Events (AEs) After Each Vaccine Dose AdministrationPain at injection site, RSV dose, given at Day 1290 Participants
Co-administration GroupNumber of Participants With Solicited Administration Site Adverse Events (AEs) After Each Vaccine Dose AdministrationErythema at injection site, PCV20 dose, given at Day 124 Participants
Co-administration GroupNumber of Participants With Solicited Administration Site Adverse Events (AEs) After Each Vaccine Dose AdministrationErythema at injection site, RSV dose, given at Day 154 Participants
Co-administration GroupNumber of Participants With Solicited Administration Site Adverse Events (AEs) After Each Vaccine Dose AdministrationSwelling at injection site, PCV20 dose, given at Day 117 Participants
Co-administration GroupNumber of Participants With Solicited Administration Site Adverse Events (AEs) After Each Vaccine Dose AdministrationSwelling at injection site, RSV dose, given at Day 126 Participants
Control GroupNumber of Participants With Solicited Administration Site Adverse Events (AEs) After Each Vaccine Dose AdministrationSwelling at injection site, PCV20 dose, given at Day 117 Participants
Control GroupNumber of Participants With Solicited Administration Site Adverse Events (AEs) After Each Vaccine Dose AdministrationPain at injection site, PCV20 dose, given at Day 1208 Participants
Control GroupNumber of Participants With Solicited Administration Site Adverse Events (AEs) After Each Vaccine Dose AdministrationErythema at injection site, RSV dose, given at Day 3133 Participants
Control GroupNumber of Participants With Solicited Administration Site Adverse Events (AEs) After Each Vaccine Dose AdministrationPain at injection site, RSV dose, given at Day 31225 Participants
Control GroupNumber of Participants With Solicited Administration Site Adverse Events (AEs) After Each Vaccine Dose AdministrationSwelling at injection site, RSV dose, given at Day 3121 Participants
Control GroupNumber of Participants With Solicited Administration Site Adverse Events (AEs) After Each Vaccine Dose AdministrationErythema at injection site, PCV20 dose, given at Day 121 Participants
Secondary

Number of Participants With Solicited Systemic AEs After Each Vaccine Dose Administration

The solicited systemic events after vaccination include fever (pyrexia), headache, fatigue, myalgia and arthralgia. Fever is defined as body temperature \>=38 degree Celsius; preferred location for measuring the temperature is oral.

Time frame: Within 7 days (the day of vaccination and 6 subsequent days) after each vaccine administration (vaccines administered at Day 1 for Co-Administration Group and at Days 1 and 31 for Control group)

Population: Exposed set. Only those participants with solicited systemic AEs were included in this analysis.

ArmMeasureGroupValue (COUNT_OF_PARTICIPANTS)
Co-administration GroupNumber of Participants With Solicited Systemic AEs After Each Vaccine Dose AdministrationMyalgia, Dosing at Day 1176 Participants
Co-administration GroupNumber of Participants With Solicited Systemic AEs After Each Vaccine Dose AdministrationFatigue, Dosing at Day 1198 Participants
Co-administration GroupNumber of Participants With Solicited Systemic AEs After Each Vaccine Dose AdministrationArthralgia, Dosing at Day 180 Participants
Co-administration GroupNumber of Participants With Solicited Systemic AEs After Each Vaccine Dose AdministrationFever, Dosing at Day 116 Participants
Co-administration GroupNumber of Participants With Solicited Systemic AEs After Each Vaccine Dose AdministrationHeadache, Dosing at Day 1144 Participants
Control GroupNumber of Participants With Solicited Systemic AEs After Each Vaccine Dose AdministrationFatigue, Dosing at Day 1152 Participants
Control GroupNumber of Participants With Solicited Systemic AEs After Each Vaccine Dose AdministrationFatigue, Dosing at Day 31144 Participants
Control GroupNumber of Participants With Solicited Systemic AEs After Each Vaccine Dose AdministrationMyalgia, Dosing at Day 31108 Participants
Control GroupNumber of Participants With Solicited Systemic AEs After Each Vaccine Dose AdministrationArthralgia, Dosing at Day 141 Participants
Control GroupNumber of Participants With Solicited Systemic AEs After Each Vaccine Dose AdministrationMyalgia, Dosing at Day 189 Participants
Control GroupNumber of Participants With Solicited Systemic AEs After Each Vaccine Dose AdministrationArthralgia, Dosing at Day 3167 Participants
Control GroupNumber of Participants With Solicited Systemic AEs After Each Vaccine Dose AdministrationFever, Dosing at Day 14 Participants
Control GroupNumber of Participants With Solicited Systemic AEs After Each Vaccine Dose AdministrationFever, Dosing at Day 318 Participants
Control GroupNumber of Participants With Solicited Systemic AEs After Each Vaccine Dose AdministrationHeadache, Dosing at Day 183 Participants
Control GroupNumber of Participants With Solicited Systemic AEs After Each Vaccine Dose AdministrationHeadache, Dosing at Day 3197 Participants
Secondary

Number of Participants With Unsolicited AEs

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the administration of a study vaccine, which does not necessarily have a causal relationship with study vaccine. An unsolicited AE is an AE that is either not included in the list of solicited events or could be included in the list of solicited events but with an onset outside the specified period of follow-up for solicited events. Unsolicited AEs are communicated by participant/participant's caregiver(s) who have signed the informed consent. Unsolicited AEs include both serious adverse events (SAEs) and non-serious AEs.

Time frame: Within 30 days (the day of vaccination and 29 subsequent days) after each vaccine administration (vaccines administered at Day 1 for Co-Administration Group and at Days 1 and 31 for Control group)

Population: Exposed set.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Co-administration GroupNumber of Participants With Unsolicited AEs60 Participants
Control GroupNumber of Participants With Unsolicited AEs98 Participants

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026