A Phase 3 interventional study of RSVPreF3(120 μg) and Flu Quadrivalent influenza vaccine (15 μg HA) in Respiratory Syncytial Virus Infections, sponsored by GlaxoSmithKline. Completed at 36 sites in 5 countries. Open to female participants aged 18 Years to 49 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2023-10-05.
Sponsored by GlaxoSmithKline · Phase 3, Interventional, and Prevention
The purpose of this study is to evaluate the clinical lot-to-lot consistency of the respiratory syncytial virus (RSV) maternal (RSV MAT) vaccine administered to healthy non-pregnant women 18-49 years of age (YOA). In addition, this study will evaluate immunogenicity, safety and reactogenicity from co-administration of RSV MAT vaccine and GSK's quadrivalent seasonal influenza (Flu D-QIV) vaccine.
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Healthy female participants; as established by medical history and clinical examination, aged 18 to 49 years at the time of the first study intervention administration.
Exclusion Criteria:
Medical conditions
Any clinically significant* hematological parameter and/or biochemical laboratory abnormality.
*The investigator should use his/her clinical judgment to decide which abnormalities are clinically significant.
Prior/Concomitant therapy
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 exclusions
Participants randomized to the RSV lot1 Group received one dose of RSV MAT Lot 1 vaccine intramuscularly at Day 1. Participants were also provided with an option of receiving Flu D-QIV vaccine at Day 31 to allow the participants receive the standard of care.
Combination Product: RSVPreF3(120 μg)
Participants randomized to the RSV lot2 Group received one dose of RSV MAT Lot 2 vaccine intramuscularly at Day 1. Participants were also provided with an option of receiving Flu D-QIV vaccine at Day 31 to allow the participants receive the standard of care.
Combination Product: RSVPreF3(120 μg)
Participants randomized to the RSV lot3 Group received one dose of RSV MAT Lot 3 vaccine intramuscularly at Day 1. Participants were also provided with an option of receiving Flu D-QIV vaccine at Day 31 to allow the participants receive the standard of care.
Combination Product: RSVPreF3(120 μg)
Participants randomized in this group received one dose of RSVPreF3 vaccine (RSV MAT vaccine) from one of the three lots used (Lot 1, Lot 2 or Lot 3 of same formulation of RSVPreF3 vaccine) and one dose of the Flu D-QIV vaccine on Day 1, and were followed up until the end of the study (Day 181). The participants in this group were considered for the immunogenicity and safety analyses of the RSV MAT and Flu D-QIV vaccines.
Combination Product: Flu Quadrivalent influenza vaccine (15 μg HA)
Participants randomized in this group received one dose of Flu D-QIV vaccine co-administered with one dose of placebo at Day 1, and were followed up until the end of the study (Day 181). This group was considered comparator for immunogenicity and safety analyses for RSV+ Flu Pooled group.
Combination Product: Flu Quadrivalent influenza vaccine (15 μg HA) · Combination Product: Placebo
A single dose of RSVPreF3(120 μg) combined with Sodium Chloride (NaCl) was administrated intramuscular (IM). There were used 3 different lots of RSVPreF3(120 μg), one for each individual group (RSV lot1 Group, RSV lot2 Group and RSV lot3 Group) considered under RSV pooled Group.
A single dose of Flu Quadrivalent influenza (15 μg HA) vaccine was administrated intramuscular (IM).
One dose of placebo, administered intramuscularly in the deltoid region of the right arm, at Day 1.
Percentage of Participants Reporting Solicited Administration Site Events in RSV Pooled Group, RSV+Flu Pooled Group and Flu+Placebo Group
Assessed solicited administration site events include pain, erythema and swelling. This objective analyzed the safety and reactogenicity of RSV MAT vaccine when given alone (pooled lots) or co-administered with Flu D-QIV. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV and RSV+Flu groups and Flu+Placebo Group, since minimal differences were expected between participants who received different RSV lots of the vaccine.
Time frame: From Day 1 to Day 7 (including Day 7)
Percentage of Participants Reporting Solicited Systemic Events in RSV Pooled Group, RSV+Flu Pooled Group and Flu+Placebo Group
Assessed solicited systemic events include fatigue, headache, gastrointestinal (GI) symptoms (nausea, vomiting, diarrhea, abdominal pain) and fever. The preferred location for measuring temperature was the oral cavity. Fever was defined as temperature equal to or above (≥) 38.0 °C/ 100.4°F. This objective analyzed the safety and reactogenicity of RSV MAT vaccine when given alone (pooled lots) or co-administered with Flu D-QIV. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV and RSV+Flu groups and Flu+Placebo Group, since minimal differences were expected between participants who received different RSV lots of the vaccine.
Time frame: From Day 1 to Day 7 (including Day 7)
Percentage of Participants Reporting Unsolicited Adverse Events (AEs) in RSV Pooled Group, RSV+Flu Pooled Group and Flu+Placebo Group
An unsolicited AE is any AE reported in addition to those solicited during the clinical study. Also, any 'solicited' symptom with onset outside the specified period of follow-up for solicited symptoms is reported as an unsolicited adverse event. This objective analyzed the safety and reactogenicity of RSV MAT vaccine when given alone (pooled lots) or co-administered with Flu D-QIV. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV and RSV+Flu groups and Flu+Placebo Group, since minimal differences were expected between participants who received different RSV lots of the vaccine.
Time frame: From Day 1 to Day 30 (including Day 30)
Percentage of Participants Reporting Serious Adverse Events (SAEs) in RSV Pooled Group, RSV+Flu Pooled Group and Flu+Placebo Group
An SAE is any untoward medical occurrence that results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, is a congenital anomaly/birth defect in the offspring of a study participant or results i+F2n abnormal pregnancy outcomes. This objective analyzed the safety and reactogenicity of RSV MAT vaccine when given alone (pooled lots) or co-administered with Flu D-QIV. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV and RSV+Flu groups and Flu+Placebo Group, since minimal differences were expected between participants who received different RSV lots of the vaccine.
Time frame: From Day 1 to Day 30 (including Day 30)
Percentage of Participants Reporting SAEs in RSV Pooled Group, RSV+Flu Pooled Group and Flu+Placebo Group
An SAE is any untoward medical occurrence that results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, is a congenital anomaly/birth defect in the offspring of a study participant or results in abnormal pregnancy outcomes.This objective analyzed the safety and reactogenicity of RSV MAT vaccine when given alone (pooled lots) or co-administered with Flu D-QIV. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV and RSV+Flu groups and Flu+Placebo Group, since minimal differences were expected between participants who received different RSV lots of the vaccine.
Time frame: From first vaccination up to study end (Day 1 to Day 181)
RSV MAT Immunoglobulin G (IgG) Enzyme-Linked Immunosorbent Assay (ELISA) Concentrations for Participants in RSV lot1, RSV lot2 and RSV lot3 Groups at Day 31
Serological assays for the determination of IgG antibodies against RSV MAT were performed by ELISA. RSV MAT IgG concentrations were expressed as geometric mean concentrations (GMCs), in ELISA units per milliliter (EU/mL). As pre-specified in protocol, data reported in this outcome measure was presented only for individual RSV lot groups (RSV lot1, RSV lot2, RSV lot3), as the purpose was to analyze RSV MAT IgG ELISA concentrations, in order to demonstrate the lot-to-lot consistency of the vaccine lots.
Time frame: At Day 31
Flu D-QIV Haemagglutinin Inhibition (HI) Antibody Titers Against 3 Influenza Strains for Participants in Flu+Placebo Group and RSV+Flu Pooled Group at Day 31
Flu D-QIV HI antibody titers against 3 influenza strains (A/Tasmania/503/2020 (H3N2) IVR-221; B/Washington/02/2019; B/Phuket/3073/2013) were expressed as geometric mean titers (GMTs), as assessed by HI assay. This objective analyzed the humoral immune response to the Flu D-QIV vaccine when given alone and co-administered with RSV MAT vaccine in terms of antibody titers against 3 influenza strains. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV+Flu Group and Flu+Placebo Group, since minimal differences were expected between participants who received different RSV lots of the vaccine.
Time frame: At Day 31
RSV A Neutralizing Antibody Titers for Participants in RSV Pooled Group and RSV+Flu Pooled Group at Day 1 and Day 31
Serological assays for the determilnation of antibodies against RSV A were performed by neutralization assay. RSV A neutralizing antibody titers were expressed as geometric mean titers (GMTs), in serum dilution inducing 60% inhibition in plaque forming units (ED60). This objective analyzed the humoral immune response of RSV MAT vaccine when given alone and co-administered with Flu D-QIV in terms of RSV A neutralizing antibody. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV and RSV+Flu groups, since minimal differences were expected between participants who received different RSV lots of the vaccine.
Time frame: At Day 1 and Day 31
Seroconversion Rate (SCR) to Flu D-QIV HI Antibody Titers Against 3 Influenza Strains for Participants in Flu+Placebo Group and RSV+Flu Pooled Group at Day 31
The SCR was defined as the percentage of participants with: a Day 1 (pre-vaccination) serum anti-HI titer \<1:10 and a Day 31 (post-vaccination) serum anti-HI titer ≥1:40, or a Day 1 (pre-vaccination) serum anti-HI titer ≥ 1:10 and a fold increase (post/pre) ≥ 4 at Day 31. The 3 influenza strains assessed were: A/Tasmania/503/2020 (H3N2) IVR-221; B/Washington/02/2019 and B/Phuket/3073/2013. This objective analyzed the seroconversion rate to the Flu D-QIV vaccine when given alone and co-administered with RSV MAT vaccine. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV+Flu group and Flu+Placebo Group, since minimal differences were expected between participants who received different RSV lots of the vaccine.
Time frame: At Day 31
RSV B Neutralizing Antibody Titers for Participants in RSV Pooled Group and RSV+Flu Pooled Group at Day 1 and Day 31
Serological assays for the determination of antibodies against RSV B were performed by neutralization assay. RSV B neutralizing antibody titers were expressed as GMTs, in ED60. This objective analyzed the humoral immune response of RSV MAT vaccine when given alone and co-administered with Flu D-QIV in terms of RSV B neutralizing antibody. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV and RSV+Flu groups, since minimal differences were expected between participants who received different RSV lots of the vaccine.
Time frame: At Day 1 and Day 31
RSV MAT IgG Concentrations for Participants in RSV Pooled Group and RSV+Flu Pooled Group at Day 1 and Day 31
Serological assays for the determination of IgG antibodies against RSV MAT were performed by ELISA. RSV MAT IgG concentrations were expressed as GMCs, in EU/mL. This objective analyzed the humoral immune response of RSV MAT vaccine when given alone and co-administered with Flu D-QIV in terms of RSV MAT IgG concentrations. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV and RSV+Flu groups, since minimal differences were expected between participants who received different RSV lots of the vaccine.
Time frame: At Day 1 and Day 31
Flu D-QIV HI Antibody Titers Against 3 Influenza Strains for Participants in Flu+Placebo Group and RSV+Flu Pooled Group at Day 1 and Day 31
Flu D-QIV HI antibody titers against 3 influenza strains (A/Tasmania/503/2020 (H3N2) IVR-221;B/Washington/02/2019; B/Phuket/3073/2013) were expressed as geometric mean titers (GMTs), as assessed by HI assay. This objective analyzed the humoral immune response to the Flu D-QIV vaccine when given alone and co-administered with RSV MAT vaccine in terms of antibody titers against 3 influenza strains. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV+Flu Group and Flu+Placebo Group, since minimal differences were expected between participants who received different RSV lots of the vaccine.
Time frame: At Day 1 and Day 31
Seroprotection Rate (SPR) to Flu D-QIV HI Antibody Titers for Participants in Flu+Placebo Group and RSV+Flu Pooled Group at Day 1 and Day 31
SPR was measured by the percentage of participants achieving an HI antibody titer ≥1:40. This objective analyzed the seroprotection rate to the Flu D-QIV vaccine when given alone and co-administered with RSV MAT vaccine. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV+Flu Group and Flu+Placebo Group, since minimal differences were expected between participants who received different RSV lots of the vaccine.
Time frame: At Day 1 and Day 31
RSV A Neutralizing Antibody Titers for Participants in RSV lot1, RSV lot2 and RSV lot3 Groups at Day 1 and Day 31
Serological assays for the determination of antibodies against RSV-A were performed by neutralization assay. RSV A neutralizing antibody titers were expressed as GMTs, in ED60. As pre-specified in protocol, data reported in this outcome measure was presented only for individual RSV lot groups (RSV lot1, RSV lot2, RSV lot3), as the purpose was to analyze the humoral immune response of RSV A neutralizing antibody titers, in order to demonstrate the lot-to-lot consistency of the vaccine lots.
Time frame: At Day 1 and Day 31
RSV B Neutralizing Antibody Titers for Participants in RSV lot1, RSV lot2 and RSV lot3 Groups at Day 1 and Day 31
Serological assays for the determination of antibodies against RSV B were performed by neutralization assay. RSV B neutralizing antibody titers were expressed as GMTs, in ED60. As pre-specified in protocol, data reported in this outcome measure was presented only for individual RSV lot groups (RSV lot1, RSV lot2, RSV lot3), as the purpose was to analyze the humoral immune response of RSV B neutralizing antibody titers, in order to demonstrate the lot-to-lot consistency of the vaccine lots.
Time frame: At Day 1 and Day 31
RSV MAT IgG Concentrations for Participants in RSV lot1, RSV lot2 and RSV lot3 Groups at Day 1 and Day 31
Serological assays for the determination of IgG antibodies against RSV MAT were performed by ELISA. RSV MAT IgG concentrations were expressed as GMCs, in EU/mL. As pre-specified in protocol, data reported in this outcome measure was presented only for individual RSV lot groups (RSV lot1, RSV lot2, RSV lot3), as the purpose was to analyze the RSV MAT IgG concentration, in order to demonstrate the lot-to-lot consistency of the vaccine lots.
Time frame: At Day 1 and Day 31
Out of 1586 participants enrolled,47 participants did not receive vaccination as they did not meet the eligibility criteria or they were lost to follow up, therefore only 1539 participants were included in the Exposed Set and started the study.
| Milestone | RSV lot1 Group | RSV lot2 Group | RSV lot3 Group | RSV+Flu Pooled Group | Flu+Placebo Group |
|---|---|---|---|---|---|
| Started | 220 | 223 | 218 | 438 | 440 |
| Completed | 217 | 220 | 214 | 433 | 427 |
| Not completed | 3 | 3 | 4 | 5 | 13 |
| Withdrew: Lost to follow-up | 3 | 2 | 3 | 5 | 13 |
| Withdrew: Withdrawal by subject | 0 | 1 | 0 | 0 | 0 |
| Withdrew: Migrated / moved from the study area | 0 | 0 | 1 | 0 | 0 |
Assessed solicited administration site events include pain, erythema and swelling. This objective analyzed the safety and reactogenicity of RSV MAT vaccine when given alone (pooled lots) or co-administered with Flu D-QIV. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV and RSV+Flu groups and Flu+Placebo Group, since minimal differences were expected between participants who received different RSV lots of the vaccine.
| Percentage of participants | RSV Pooled Group | RSV+Flu Pooled Group | Flu+Placebo Group |
|---|---|---|---|
| Pain | 53.6 (49.7 to 57.5) | 51.1 (46.4 to 55.9) | 34.4 (30 to 39) |
| Erythema | 4.4 (3 to 6.2) | 3.7 (2.1 to 5.9) | 0.5 (0.1 to 1.6) |
| Swelling | 4.5 (3.1 to 6.4) | 4.6 (2.8 to 7) | 0.9 (0.2 to 2.3) |
Assessed solicited systemic events include fatigue, headache, gastrointestinal (GI) symptoms (nausea, vomiting, diarrhea, abdominal pain) and fever. The preferred location for measuring temperature was the oral cavity. Fever was defined as temperature equal to or above (≥) 38.0 °C/ 100.4°F. This objective analyzed the safety and reactogenicity of RSV MAT vaccine when given alone (pooled lots) or co-administered with Flu D-QIV. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV and RSV+Flu groups and Flu+Placebo Group, since minimal differences were expected between participants who received different RSV lots of the vaccine.
| Percentage of participants | RSV Pooled Group | RSV+Flu Pooled Group | Flu+Placebo Group |
|---|---|---|---|
| Fatigue | 52 (48.1 to 55.8) | 59.8 (55.1 to 64.4) | 51.9 (47.1 to 56.7) |
| Headache | 47.6 (43.7 to 51.5) | 51.4 (46.6 to 56.1) | 43.1 (38.4 to 47.8) |
| Nausea | 14.5 (11.9 to 17.5) | 15.3 (12.1 to 19) | 12.3 (9.4 to 15.7) |
| Vomiting | 2.3 (1.3 to 3.7) | 1.8 (0.8 to 3.6) | 2.3 (1.1 to 4.1) |
| Diarrhea | 12.1 (9.7 to 14.9) | 13 (10 to 16.5) | 17.1 (13.7 to 20.9) |
| Abdominal pain | 12 (9.6 to 14.7) | 13.5 (10.4 to 17) | 14.1 (11 to 17.7) |
| Temperature | 2.4 (1.4 to 3.9) | 3 (1.6 to 5) | 0.7 (0.1 to 2) |
An unsolicited AE is any AE reported in addition to those solicited during the clinical study. Also, any 'solicited' symptom with onset outside the specified period of follow-up for solicited symptoms is reported as an unsolicited adverse event. This objective analyzed the safety and reactogenicity of RSV MAT vaccine when given alone (pooled lots) or co-administered with Flu D-QIV. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV and RSV+Flu groups and Flu+Placebo Group, since minimal differences were expected between participants who received different RSV lots of the vaccine.
| Percentage of participants | RSV Pooled Group | RSV+Flu Pooled Group | Flu+Placebo Group |
|---|---|---|---|
| Percentage of Participants Reporting Unsolicited Adverse Events (AEs) in RSV Pooled Group, RSV+Flu Pooled Group and Flu+Placebo Group | 26.6 (23.3 to 30.2) | 30.1 (25.9 to 34.7) | 25.7 (21.7 to 30) |
An SAE is any untoward medical occurrence that results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, is a congenital anomaly/birth defect in the offspring of a study participant or results i+F2n abnormal pregnancy outcomes. This objective analyzed the safety and reactogenicity of RSV MAT vaccine when given alone (pooled lots) or co-administered with Flu D-QIV. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV and RSV+Flu groups and Flu+Placebo Group, since minimal differences were expected between participants who received different RSV lots of the vaccine.
| Percentage of participants | RSV Pooled Group | RSV+Flu Pooled Group | Flu+Placebo Group |
|---|---|---|---|
| Percentage of Participants Reporting Serious Adverse Events (SAEs) in RSV Pooled Group, RSV+Flu Pooled Group and Flu+Placebo Group | 0.2 (0 to 0.8) | 0 (0 to 0.8) | 0.2 (0 to 1.3) |
An SAE is any untoward medical occurrence that results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, is a congenital anomaly/birth defect in the offspring of a study participant or results in abnormal pregnancy outcomes.This objective analyzed the safety and reactogenicity of RSV MAT vaccine when given alone (pooled lots) or co-administered with Flu D-QIV. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV and RSV+Flu groups and Flu+Placebo Group, since minimal differences were expected between participants who received different RSV lots of the vaccine.
| Percentage of participants | RSV Pooled Group | RSV+Flu Pooled Group | Flu+Placebo Group |
|---|---|---|---|
| Percentage of Participants Reporting SAEs in RSV Pooled Group, RSV+Flu Pooled Group and Flu+Placebo Group | 0.8 (0.2 to 1.8) | 0.9 (0.2 to 2.3) | 0.9 (0.2 to 2.3) |
Serological assays for the determination of IgG antibodies against RSV MAT were performed by ELISA. RSV MAT IgG concentrations were expressed as geometric mean concentrations (GMCs), in ELISA units per milliliter (EU/mL). As pre-specified in protocol, data reported in this outcome measure was presented only for individual RSV lot groups (RSV lot1, RSV lot2, RSV lot3), as the purpose was to analyze RSV MAT IgG ELISA concentrations, in order to demonstrate the lot-to-lot consistency of the vaccine lots.
| EU/mL | RSV lot1 Group | RSV lot2 Group | RSV lot3 Group |
|---|---|---|---|
| RSV MAT Immunoglobulin G (IgG) Enzyme-Linked Immunosorbent Assay (ELISA) Concentrations for Participants in RSV lot1, RSV lot2 and RSV lot3 Groups at Day 31 | 102811.0 (95243.6 to 110979.6) | 100635.8 (92970.2 to 108933.4) | 108709.3 (101913.7 to 115958.0) |
Flu D-QIV HI antibody titers against 3 influenza strains (A/Tasmania/503/2020 (H3N2) IVR-221; B/Washington/02/2019; B/Phuket/3073/2013) were expressed as geometric mean titers (GMTs), as assessed by HI assay. This objective analyzed the humoral immune response to the Flu D-QIV vaccine when given alone and co-administered with RSV MAT vaccine in terms of antibody titers against 3 influenza strains. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV+Flu Group and Flu+Placebo Group, since minimal differences were expected between participants who received different RSV lots of the vaccine.
| Titers | RSV+Flu Pooled Group | Flu+Placebo Group |
|---|---|---|
| A/Tasmania/503/2020 (H3N2) | 301.6 (274.0 to 331.9) | 421.3 (383.4 to 463.0) |
| B/Washington/02/2019 | 30.7 (27.3 to 34.6) | 33.0 (29.3 to 37.2) |
| B/Phuket/3073/2013 | 56.2 (50.7 to 62.3) | 69.9 (62.6 to 77.9) |
Serological assays for the determilnation of antibodies against RSV A were performed by neutralization assay. RSV A neutralizing antibody titers were expressed as geometric mean titers (GMTs), in serum dilution inducing 60% inhibition in plaque forming units (ED60). This objective analyzed the humoral immune response of RSV MAT vaccine when given alone and co-administered with Flu D-QIV in terms of RSV A neutralizing antibody. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV and RSV+Flu groups, since minimal differences were expected between participants who received different RSV lots of the vaccine.
| Titers | RSV Pooled Group | RSV+Flu Pooled Group |
|---|---|---|
| Day 1 | 721.6 (676.5 to 769.7) | 707.2 (653.4 to 765.5) |
| Day 31 | 8900.9 (8272.1 to 9577.5) | 7761.6 (7092.8 to 8493.6) |
The SCR was defined as the percentage of participants with: a Day 1 (pre-vaccination) serum anti-HI titer \<1:10 and a Day 31 (post-vaccination) serum anti-HI titer ≥1:40, or a Day 1 (pre-vaccination) serum anti-HI titer ≥ 1:10 and a fold increase (post/pre) ≥ 4 at Day 31. The 3 influenza strains assessed were: A/Tasmania/503/2020 (H3N2) IVR-221; B/Washington/02/2019 and B/Phuket/3073/2013. This objective analyzed the seroconversion rate to the Flu D-QIV vaccine when given alone and co-administered with RSV MAT vaccine. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV+Flu group and Flu+Placebo Group, since minimal differences were expected between participants who received different RSV lots of the vaccine.
| Percentage of participants | RSV+Flu Pooled Group | Flu+Placebo Group |
|---|---|---|
| A/Tasmania/503/2020 (H3N2) | 42.5 (37.6 to 47.5) | 45.9 (41 to 50.9) |
| B/Washington/02/2019 | 25.4 (21.2 to 30) | 29.5 (25.1 to 34.2) |
| B/Phuket/3073/2013 | 31.4 (26.9 to 36.2) | 35.5 (30.8 to 40.4) |
Serological assays for the determination of antibodies against RSV B were performed by neutralization assay. RSV B neutralizing antibody titers were expressed as GMTs, in ED60. This objective analyzed the humoral immune response of RSV MAT vaccine when given alone and co-administered with Flu D-QIV in terms of RSV B neutralizing antibody. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV and RSV+Flu groups, since minimal differences were expected between participants who received different RSV lots of the vaccine.
| Titers | RSV Pooled Group | RSV+Flu Pooled Group |
|---|---|---|
| Day 1 | 967.4 (909.5 to 1028.9) | 940.1 (871 to 1014.6) |
| Day 31 | 11030.5 (10344.5 to 11762) | 9162.3 (8483.3 to 9895.8) |
Serological assays for the determination of IgG antibodies against RSV MAT were performed by ELISA. RSV MAT IgG concentrations were expressed as GMCs, in EU/mL. This objective analyzed the humoral immune response of RSV MAT vaccine when given alone and co-administered with Flu D-QIV in terms of RSV MAT IgG concentrations. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV and RSV+Flu groups, since minimal differences were expected between participants who received different RSV lots of the vaccine.
| EU/mL | RSV Pooled Group | RSV+Flu Pooled Group |
|---|---|---|
| Day 1 | 5522.7 (5285.7 to 5770.4) | 5772 (5455.8 to 6106.4) |
| Day 31 | 104025.1 (99714.5 to 108522.2) | 83937 (79640.9 to 88464.9) |
Flu D-QIV HI antibody titers against 3 influenza strains (A/Tasmania/503/2020 (H3N2) IVR-221;B/Washington/02/2019; B/Phuket/3073/2013) were expressed as geometric mean titers (GMTs), as assessed by HI assay. This objective analyzed the humoral immune response to the Flu D-QIV vaccine when given alone and co-administered with RSV MAT vaccine in terms of antibody titers against 3 influenza strains. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV+Flu Group and Flu+Placebo Group, since minimal differences were expected between participants who received different RSV lots of the vaccine.
| Titers | RSV+Flu Pooled Group | Flu+Placebo Group |
|---|---|---|
| A/Tasmania/503/2020 (H3N2) , Day 1 | 92.2 (81.2 to 104.8) | 110.3 (97.2 to 125.1) |
| A/Tasmania/503/2020 (H3N2) , Day 31 | 301.6 (274 to 331.9) | 421.3 (383.4 to 463) |
| B/Washington/02/2019 , Day 1 | 11.7 (10.6 to 13) | 10.3 (9.4 to 11.3) |
| B/Washington/02/2019 , Day 31 | 30.7 (27.3 to 34.6) | 33 (29.3 to 37.2) |
| B/Phuket/3073/2013 , Day 1 | 21.2 (19 to 23.7) | 21.9 (19.6 to 24.5) |
| B/Phuket/3073/2013 , Day 31 | 56.2 (50.7 to 62.3) | 69.9 (62.6 to 77.9) |
SPR was measured by the percentage of participants achieving an HI antibody titer ≥1:40. This objective analyzed the seroprotection rate to the Flu D-QIV vaccine when given alone and co-administered with RSV MAT vaccine. As pre-specified in protocol, data reported in this outcome measure was presented for the pooled RSV+Flu Group and Flu+Placebo Group, since minimal differences were expected between participants who received different RSV lots of the vaccine.
| Percentage of participants | RSV+Flu Pooled Group | Flu+Placebo Group |
|---|---|---|
| A/Tasmania/503/2020 (H3N2) , Day 1 | 78.7 (74.5 to 82.4) | 82.8 (79 to 86.3) |
| A/Tasmania/503/2020 (H3N2) , Day 31 | 98 (96.1 to 99.1) | 98.5 (96.8 to 99.5) |
| B/Washington/02/2019 , Day 1 | 19.7 (16.1 to 23.8) | 16.9 (13.5 to 20.8) |
| B/Washington/02/2019 , Day 31 | 48 (43 to 53) | 48.8 (43.8 to 53.8) |
| B/Phuket/3073/2013 , Day 1 | 36.7 (32.2 to 41.4) | 39.8 (35.2 to 44.6) |
| B/Phuket/3073/2013 , Day 31 | 74.4 (69.8 to 78.6) | 77.2 (72.8 to 81.2) |
Serological assays for the determination of antibodies against RSV-A were performed by neutralization assay. RSV A neutralizing antibody titers were expressed as GMTs, in ED60. As pre-specified in protocol, data reported in this outcome measure was presented only for individual RSV lot groups (RSV lot1, RSV lot2, RSV lot3), as the purpose was to analyze the humoral immune response of RSV A neutralizing antibody titers, in order to demonstrate the lot-to-lot consistency of the vaccine lots.
| Titers | RSV lot1 Group | RSV lot2 Group | RSV lot3 Group |
|---|---|---|---|
| Day 1 | 727.5 (652 to 811.6) | 758.4 (676.7 to 849.9) | 680.2 (607.4 to 761.7) |
| Day 31 | 8545.5 (7464.4 to 9783.2) | 8760.3 (7716.2 to 9945.8) | 9409.2 (8343.5 to 10611) |
Serological assays for the determination of antibodies against RSV B were performed by neutralization assay. RSV B neutralizing antibody titers were expressed as GMTs, in ED60. As pre-specified in protocol, data reported in this outcome measure was presented only for individual RSV lot groups (RSV lot1, RSV lot2, RSV lot3), as the purpose was to analyze the humoral immune response of RSV B neutralizing antibody titers, in order to demonstrate the lot-to-lot consistency of the vaccine lots.
| Titers | RSV lot1 Group | RSV lot2 Group | RSV lot3 Group |
|---|---|---|---|
| Day 1 | 895 (810.6 to 988.2) | 1030.3 (929.3 to 1142.3) | 979.7 (870.6 to 1102.4) |
| Day 31 | 10457 (9258.5 to 11810.6) | 11107.2 (9984.4 to 12356.4) | 11543.3 (10377.6 to 12840.1) |
Serological assays for the determination of IgG antibodies against RSV MAT were performed by ELISA. RSV MAT IgG concentrations were expressed as GMCs, in EU/mL. As pre-specified in protocol, data reported in this outcome measure was presented only for individual RSV lot groups (RSV lot1, RSV lot2, RSV lot3), as the purpose was to analyze the RSV MAT IgG concentration, in order to demonstrate the lot-to-lot consistency of the vaccine lots.
| EU/mL | RSV lot1 Group | RSV lot2 Group | RSV lot3 Group |
|---|---|---|---|
| Day 1 | 5691.9 (5276.8 to 6139.7) | 5613 (5197.8 to 6061.3) | 5270.1 (4883.6 to 5687.1) |
| Day 31 | 102811 (95243.6 to 110979.6) | 100635.8 (92970.2 to 108933.4) | 108709.3 (101913.7 to 115958) |
Collected over Serious Adverse Events (SAEs) were collected through the entire period of the study (from Day 1 up to study end [Day 181]). Solicited AEs were collected from Day 1 to Day 7 included and unsolicited AEs were collected from Day 1 to Day 30 included.. Non-serious events are listed at a 0% frequency threshold.
| Group | Deaths | Serious | Other |
|---|---|---|---|
| RSV lot1 Group | 0/220 (0%) | 2/220 (0.9%) | 182/220 (82.7%) |
| RSV lot2 Group | 0/223 (0%) | 1/223 (0.4%) | 193/223 (86.5%) |
| RSV lot3 Group | 0/218 (0%) | 2/218 (0.9%) | 194/218 (89%) |
| RSV+Flu Pooled Group | 0/438 (0%) | 4/438 (0.9%) | 409/438 (93.4%) |
| Flu+Placebo Group | 0/440 (0%) | 4/440 (0.9%) | 396/440 (90%) |
| Event | RSV lot1 Group | RSV lot2 Group | RSV lot3 Group | RSV+Flu Pooled Group | Flu+Placebo Group |
|---|---|---|---|---|---|
| Fibula fractureInjury, poisoning and procedural complications | 0/220 | 0/223 | 1/218 | 0/438 | 0/440 |
| Cervical dysplasiaReproductive system and breast disorders | 0/220 | 0/223 | 1/218 | 0/438 | 0/440 |
| Joint ankylosisMusculoskeletal and connective tissue disorders | 1/220 | 0/223 | 0/218 | 0/438 | 0/440 |
| Suicidal ideationPsychiatric disorders | 1/220 | 0/223 | 0/218 | 0/438 | 0/440 |
| Back painMusculoskeletal and connective tissue disorders | 0/220 | 1/223 | 0/218 | 0/438 | 0/440 |
| Greater trochanteric pain syndromeMusculoskeletal and connective tissue disorders | 0/220 | 1/223 | 0/218 | 0/438 | 0/440 |
| Intervertebral disc protrusionMusculoskeletal and connective tissue disorders | 0/220 | 0/223 | 0/218 | 1/438 | 0/440 |
| OverdoseInjury, poisoning and procedural complications | 0/220 | 0/223 | 0/218 | 1/438 | 0/440 |
| Suicide attemptPsychiatric disorders | 0/220 | 0/223 | 0/218 | 1/438 | 0/440 |
| AppendicitisInfections and infestations | 0/220 | 0/223 | 0/218 | 1/438 | 0/440 |
| Event | RSV lot1 Group | RSV lot2 Group | RSV lot3 Group | RSV+Flu Pooled Group | Flu+Placebo Group |
|---|---|---|---|---|---|
| Administration site painGeneral disorders | 108/220 | 131/223 | 115/218 | 360/438 | 327/440 |
| FatigueGeneral disorders | 110/220 | 113/223 | 121/218 | 263/438 | 230/440 |
| HeadacheNervous system disorders | 110/220 | 108/223 | 108/218 | 227/438 | 196/440 |
| DiarrhoeaGastrointestinal disorders | 29/220 | 25/223 | 28/218 | 59/438 | 77/440 |
| NauseaGastrointestinal disorders | 34/220 | 31/223 | 32/218 | 68/438 | 54/440 |
| Abdominal painGastrointestinal disorders | 25/220 | 33/223 | 25/218 | 61/438 | 63/440 |
| Administration site swellingGeneral disorders | 9/220 | 11/223 | 10/218 | 32/438 | 14/440 |
| Administration site erythemaGeneral disorders | 10/220 | 9/223 | 10/218 | 18/438 | 7/440 |
| PyrexiaGeneral disorders | 6/220 | 3/223 | 8/218 | 14/438 | 3/440 |
| NasopharyngitisInfections and infestations | 4/220 | 4/223 | 2/218 | 13/438 | 15/440 |
| Age, Continuous(YEARS) | RSV lot1 Group | RSV lot2 Group | RSV lot3 Group | RSV+Flu Pooled Group | Flu+Placebo Group | Total |
|---|---|---|---|---|---|---|
| Mean | 32.0 ± 9.6 | 31.4 ± 9.4 | 31.9 ± 9.3 | 32.0 ± 8.9 | 32.1 ± 8.9 | 31.9 ± 9.1 |
| Sex: Female, Male(Participants) | RSV lot1 Group | RSV lot2 Group | RSV lot3 Group | RSV+Flu Pooled Group | Flu+Placebo Group | Total |
|---|---|---|---|---|---|---|
| Female | 220 | 223 | 218 | 438 | 440 | 1539 |
| Male | 0 | 0 | 0 | 0 | 0 | 0 |
| Race/Ethnicity, Customized(Participants) | RSV lot1 Group | RSV lot2 Group | RSV lot3 Group | RSV+Flu Pooled Group | Flu+Placebo Group | Total |
|---|---|---|---|---|---|---|
| AMERICAN INDIAN OR ALASKA NATIVE | 2 | 4 | 3 | 10 | 7 | 26 |
| ASIAN | 22 | 25 | 21 | 38 | 43 | 149 |
| BLACK OR AFRICAN AMERICAN | 12 | 3 | 6 | 17 | 17 | 55 |
| NATIVE HAWAIIAN OR OTHER PACIFIC ISLANDER | 0 | 0 | 0 | 1 | 0 | 1 |
| OTHER | 1 | 4 | 3 | 3 | 7 | 18 |
| WHITE | 183 | 187 | 185 | 369 | 366 | 1290 |
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Supporting information: Study protocol, Sap, Icf, Csr
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