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Clinical Study to Evaluate the Efficacy, Safety and Immunogenicity of QIVc in Subjects ≥2 to <18 Years of Age

Primary Purpose

Influenza, Human

Status
Completed
Phase
Phase 3
Locations
International
Study Type
Interventional
Intervention
QIVc
Non-influenza Comparator Vaccine
Sponsored by
Seqirus
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional prevention trial for Influenza, Human focused on measuring Influenza vaccine

Eligibility Criteria

2 Years - 17 Years (Child)All SexesAccepts Healthy Volunteers

Inclusion Criteria:

  • Male or female ≥2 to <18 years of age on the day of the first study vaccination
  • Subject's parent(s) or legal guardian(s) who was/were able to give informed consent/dissent after the nature of the study had been explained in accordance with the practices described in the study and according to local regulatory requirements
  • If the subject was of an age where, according to local regulations, informed assent was required, he/she must have provided assent to participate in the study
  • Subject/subject's parent(s) or legal guardian(s) was/were able to comply with study procedures and was/were available for follow-up; and
  • Subject was in generally good health as per the investigator's medical judgment

Exclusion Criteria:

  • Clinical signs of fever and/or an oral temperature of ≥100.4°F (38.0°C) within 3 days prior to vaccination;
  • A known history of any anaphylaxis, serious vaccine reactions or hypersensitivity to any of the vaccine components described in the Investigator's Brochure, or had any of the contraindications listed in the package insert of the comparator vaccine;
  • A history of Guillain-Barré syndrome or other de-myelinating diseases such as encephalomyelitis and transverse myelitis;
  • Female subject of childbearing potential (ie, post onset of menarche and before natural or induced menopause), sexually active, and who did not use any acceptable contraceptive methods for at least 2 months prior to study entry and who did not intend to use any acceptable contraceptive methods throughout subject participation (acceptable contraceptive methods included: abstinence; hormonal contraceptive [such as oral, injection, transdermal patch, implant]; diaphragm with spermicide; tubal occlusion device; intrauterine device [IUD]; tubal ligation; male partner using condom; or male partner having been vasectomized);
  • Pregnant or breast feeding female;
  • Subject and/or subject's parent/guardians who were not able to comprehend or follow all required study procedures for the entire period of the study;
  • Received prior Meningococcal ACWY vaccination that conflicted with national recommendations or local practices for the timing of the primary or the booster vaccination;
  • Received influenza vaccination or had documented influenza disease in the last 6 months;
  • Known or suspected congenital or acquired immunodeficiency; or received immunosuppressive therapy, such as anti-cancer chemotherapy or radiation therapy, within the preceding 6 months; or systemic corticosteroid therapy (prednisone or equivalent) at any dose for more than 2 consecutive weeks (14 days) within the past 3 months. Topical, inhaled and intra-nasal corticosteroids were permitted. Intermittent use (1 dose in 30 days) of intra-articular corticosteroids was also permitted;
  • Administration of immunoglobulin and/or any blood products within the 3 months preceding vaccination, or administration was planned during the study;
  • Participated in any clinical study with another investigational product within 30 days prior to first study visit or intended to participate in another clinical study at any time during the conduct of this study. Concomitant participation in an observational study (not involving drugs, vaccines, or medical devices) was acceptable;
  • Medical conditions or treatments contraindicating IM vaccination due to increased risk of bleeding. These included known bleeding disorders (such as thrombocytopenia), or treatment with anticoagulants (such as warfarin) in the 3 weeks preceding vaccination. Antiplatelet agents such as low-dose aspirin, ticlopidine (Ticlid) and clopidogrel (Plavix) were permitted;
  • Evidence or history (within the previous 12 months) of drug or alcohol abuse;
  • Study personnel or immediate family members (brother, sister, child, parent), the spouse of study personnel or individuals who were financially or emotionally dependent on study staff;
  • Participated in this study in a prior season, if applicable; or
  • Any clinical condition that, in the opinion of the investigator, may have interfered with the results of the study or pose additional risk to the subject due to participation in the study.

Sites / Locations

  • 302 AusTrials Pty Ltd
  • 300 Murdoch Childrens Research Institute
  • 500 Merelahe Family Doctors Centre
  • 504 Merekivi Family Doctors Ltd
  • 502 Medicum AS
  • 503 Vee Family Doctors Centre
  • 505 Clinical Research Center
  • 505 Clinical Research Center
  • 607 Espoo Vaccine Research Clinic
  • 603 Helsinki South Vaccine Research Clinic
  • 604 Helsinki South Vaccine Research Clinic
  • 600 Järvenpää Vaccine Research Clinic
  • 606 Kokkola Vaccine Research Clinic
  • 605 Oulu Vaccine Research Clinic
  • 601 Pori Vaccine Research Clinic
  • 602 Seinäjoki Vaccine Research Clinic
  • 608 Tampere Vaccine Research Clinic
  • 609 Turku Vaccine Research Clinic
  • 706 Private Office of Children Pulmonologist
  • 704 Kauno klinikine ligonine
  • 703 UAB InMedica
  • 702 JSC Saules seimos medicinos centras
  • 700 Kaunas Silainiai Outpatient Clinic
  • 701 Naujininkai Outpatient Clinic
  • 402 De La Salle Health Sciences Institute
  • 405 De La Salle Health Sciences Institute
  • 403 Philippine General Hospital
  • 404 Philippine General Hospital
  • 400 Research Institute For Tropical Medicine
  • 401 Research Institute For Tropical Medicine
  • 406 Research Institute For Tropical Medicine
  • 803 Szpital im. Sw. Jadwigi Slaskiej w Trzebnicy
  • 805 Szpital Uniwersytecki nr 2 im. dr. Jana Biziela w Bydgoszczy
  • 800 Niepubliczny Zaklad Opieki Zdrowotnej (NZOZ) "Salmed" s. c.
  • 806 Specjalistyczny Szpital im. E. Szczeklika w Tarnowie
  • 804 Prywatny Gabinet Lekarski
  • NZLA Michalkowice - Jarosz i Partnerzy Spolka Lekarska
  • 900 Complejo Hospitalario Universitario de Santiago
  • 200 Srinagarind Hospital, Khon Kaen University
  • 201 ChiangMai University

Arms of the Study

Arm 1

Arm 2

Arm Type

Experimental

Active Comparator

Arm Label

QIVc (≥2 years to <18 Years of Age)

Non-Influenza Comparator Vaccine

Arm Description

Cell-derived Seasonal Quadrivalent Influenza Vaccine

Non-Influenza Comparator Vaccine

Outcomes

Primary Outcome Measures

Primary Efficacy: First Occurrence of Either RT-PCR- or Culture-confirmed Influenza (Time-to-event Analyses) Due to Any Influenza Type A or B Strain Regardless of Antigenic Match to the Strains Selected for the Seasonal Vaccine in Subjects ≥2 to <18 Years
The primary efficacy endpoint was defined as the time from the last study vaccination to the onset of the first occurrence of either RT-PCR- or culture-confirmed influenza (time-to-event analyses) due to any influenza Type A or B strain regardless of antigenic match to the strains selected for the seasonal vaccine, that occurred more than 14 days after the last vaccination until the end of the influenza season. Dataset Used: FAS-Efficacy = All subjects in the All Enrolled Set who received at least one dose of study vaccine and were evaluated for efficacy from 14 days after the last vaccination. The success criterion used for this primary objective was as follows: The efficacy of the QIVc was demonstrated if the lower limit (LL) of the 2-sided 95% confidence interval (CI) for VE was above 20%.
Co-Primary: First Occurrence of Either RT-PCR- or Culture-confirmed Influenza (Time-to-event Analyses) Due to Any Influenza Type A or B Strain Regardless of Antigenic Match to the Strains Selected for the Seasonal Vaccine in Subjects ≥3 to <18 Years
The co-primary efficacy endpoint: was defined as the time from the last study vaccination to the onset of the first occurrence of either RT-PCR- or culture-confirmed influenza (time-to-event analyses) due to any influenza Type A or B strain regardless of antigenic match to the strains selected for the seasonal vaccine, that occurred more than 14 days after the last vaccination until the end of the influenza season.Absolute vaccine efficacy of QIVc by first occurrence RT-PCR or culture confirmed influenza, due to any influenza Type A and B strain in subjects ≥3 years to <18 years of age

Secondary Outcome Measures

Secondary Efficacy #1: First Occurrence of Either RT-PCR- or Culture-confirmed Influenza Due to Any Influenza Type A or B Strain Regardless of Antigenic Match to the Strains Selected for the Seasonal Vaccine
The endpoint was defined as the time from the last study vaccination to the onset of the first occurrence of either RT-PCR- or culture-confirmed influenza due to any influenza Type A or B strain regardless of antigenic match to the strains selected for the seasonal vaccine, that occurred more than 14 days after the last vaccination until the end of the influenza season in subjects 2 to <18 years, 2 to <9 years, 4 to <18 years, and 9 to <18 years. Dataset used: FAS Efficacy = All subjects in the All Enrolled Set who received at least one dose of study vaccine and were evaluated for efficacy from 14 days after the last vaccination.
Secondary Efficacy #2: First Occurrence of RT-PCR-confirmed Influenza Due to Any Influenza Type A or B Strain Regardless of Antigenic Match to the Strains Selected for the Seasonal Vaccine
The endpoint was defined as the time from the last study vaccination to the onset of the first occurrence of RT-PCR-confirmed influenza due to any influenza Type A or B strain regardless of antigenic match to the strains selected for the seasonal vaccine, that occurred more than 14 days after the last vaccination until the end of the influenza season in subjects 2 to <18 years, 2 to <9 years, 4 to <18 years, and 9 to <18 years Dataset used: FAS Efficacy - All subjects in the All Enrolled Set who received at least one dose of study vaccine and were evaluated for efficacy from 14 days after the last vaccination.
Secondary Efficacy #3: First Occurrence of Culture-confirmed Influenza Due to Any Influenza Type A or B Strain Regardless of Antigenic Match to the Strains Selected for the Seasonal Vaccine
The secondary endpoint was defined as the time from the last study vaccination to the onset of the first occurrence of culture-confirmed influenza due to any influenza Type A or B strain regardless of antigenic match to the strains selected for the seasonal vaccine, that occurred more than 14 days after the last vaccination until the end of the influenza season in subjects 2 to <18 years, 2 to <9 years, 4 to <18 years, and 9 to <18 years. Dataset used: FAS Efficacy
Secondary Efficacy #4: First Occurrence of Culture-confirmed Influenza Due to Influenza Type A or B Strain Antigenically Matched to the Strains Selected for the Seasonal Vaccine
The endpoint was defined as the time from the last study vaccination to the onset of the first occurrence of culture-confirmed influenza due to influenza Type A or B strain antigenically matched to the strains selected for the seasonal vaccine, that occurred more than 14 days after the last vaccination until the end of the influenza season in subjects 2 to <18 years, 2 to <9 years, 4 to <18 years, and 9 to <18 years.
Secondary Immunogenicity: Geometric Mean Titers for 4 Influenza Strains (HI Assay)
Immunogenicity was characterized by HI assay 3 weeks after the last vaccination in a subset of subjects 2 to <9 years of age enrolled in Season 2 (n=432) and Season 3 (n=319) who were immunized and had immunogenicity data at the assessed timepoints (FAS Immunogenicity). Immunogenicity was assessed at baseline (Day 1; all subjects in immunogenicity subset), at Day 22 (all "previously vaccinated" subjects receiving a single dose of the study vaccine), and at Days 29 and 50 (all "not previously vaccinated" subjects receiving 2 doses) for all 4 influenza strains using the HI assay.
ISecondary Immunogenicity: Percentage of Subjects Achieving Seroconversion for 4 Influenza Strains (HI Assay)
Immunogenicity was characterized by HI assay 3 weeks after the last vaccination in a subset of subjects 2 to <9 years of age enrolled in Season 2 (n=432) and Season 3 (n=319) who were immunized and had immunogenicity data at the assessed timepoints (FAS Immunogenicity). Immunogenicity was assessed at baseline (Day 1; all subjects in immunogenicity subset), at Day 22 (all "previously vaccinated" subjects receiving a single dose of the study vaccine), and at Days 29 and 50 (all "not previously vaccinated" subjects receiving 2 doses) for all 4 influenza strains using the HI assay. Seroconversion was defined as: either a prevaccination HI titer <1:10 and a postvaccination HI titer ≥1:40 or a prevaccination HI titer ≥1:10 and a ≥4 fold increase in postvaccination HI titer) Dataset used: FAS Immunogenicity = All subjects in the All Enrolled Set who received at least one dose of study vaccine and provided evaluable serum samples at both baseline and after the last vaccination.
Secondary Immunogenicity: Geometric Mean Ratio for 4 Influenza Strains (HI Assay)
Immunogenicity was characterized by HI assay 3 weeks after the last vaccination in a subset of subjects 2 to <9 years of age enrolled in Season 2 (n=432) and Season 3 (n=319) who were immunized and had immunogenicity data at the assessed timepoints (FAS Immunogenicity). Immunogenicity was assessed at baseline (Day 1; all subjects in immunogenicity subset), at Day 22 (all "previously vaccinated" subjects receiving a single dose of the study vaccine), and at Days 29 and 50 (all "not previously vaccinated" subjects receiving 2 doses) for all 4 influenza strains using the HI assay. Geometric mean ratios (GMRs) measure the ratio in immunogenicity titers within subject\ Dataset used: FAS Immunogenicity = All subjects in the All Enrolled Set who received at least one dose of study vaccine and provided evaluable serum samples at both baseline and after the last vaccination.
Secondary Immunogenicity: Percentage of Subjects With HI Titer ≥1:40 for All 4 Influenza Strains (HI Assay)
Immunogenicity was characterized by HI assay 3 weeks after the last vaccination in a subset of subjects 2 to <9 years of age enrolled in Season 2 (n=432) and Season 3 (n=319) who were immunized and had immunogenicity data at the assessed timepoints (FAS Immunogenicity). Immunogenicity was assessed at baseline (Day 1; all subjects in immunogenicity subset), at Day 22 (all "previously vaccinated" subjects receiving a single dose of the study vaccine), and at Days 29 and 50 (all "not previously vaccinated" subjects receiving 2 doses) for all 4 influenza strains using the HI assay. The measures for assessing immunogenicity as determined by HI were as follows: Percentage of subjects with an HI titer ≥1:40 on Day 22 (all "previously vaccinated" subjects receiving a single vaccine dose) or Days 29 and 50 (all "not previously vaccinated" subjects receiving 2 doses) for all 4 influenza strains
Safety: Percentage of Subjects With Solicited Local and Systemic Adverse Events for 7 Days After Vaccination
The measures for assessing safety and tolerability were as follows: Percentage of subjects with solicited local and systemic adverse events (AEs) for 7 days after vaccination on Day 1 (for "previously vaccinated" subjects) or for 7 days after vaccination on Day 1 and Day 29 (for "not previously vaccinated" subjects) in the QIVc group and the non-influenza comparator vaccine group. Dataset used: Solicited Safety Set
Safety: Percentage of Subjects With Unsolicited AEs for 21 Days After Vaccination
The measures for assessing safety and tolerability were as follows: Percentage of subjects with unsolicited AEs assessed from Day 1 to Day 22 (for "previously vaccinated" subjects) or from Day 1 to Day 50 (for "not previously vaccinated" subjects) in the QIVc group and the non-influenza comparator vaccine group. Dataset used: Unsolicited Safety Set (Unsolicited Adverse Events)
Safety: Subjects With SAEs, AEs Leading to Withdrawal From Vaccination and/or the Study,(MAAEs) Within 30 Days of a 1st Occurrence, Post-ILI, and NOCDs Reported During Entire Study Participation or End of Flue Season, Whichever Was Longer
The measures for assessing safety and tolerability were as follows: Percentage of subjects with SAEs, AEs leading to withdrawal from vaccination and/or the study, Medically-Attended AEs (MAAEs) within 30 days after the first occurrence of an ILI, and New Onset of Chronic Diseases (NOCDs) reported during the subject's entire participation in the study (ie, from Day 1 to Day 181 [for "previously vaccinated" subjects] or from Day 1 to Day 209 [for "not previously vaccinated" subjects]), or until the end of influenza season, whichever was longer, and all medications associated with these events. Dataset used: Overall Safety Set

Full Information

First Posted
May 17, 2017
Last Updated
October 19, 2020
Sponsor
Seqirus
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1. Study Identification

Unique Protocol Identification Number
NCT03165617
Brief Title
Clinical Study to Evaluate the Efficacy, Safety and Immunogenicity of QIVc in Subjects ≥2 to <18 Years of Age
Official Title
A Phase III/IV, Stratified, Randomized, Observer Blind, Multicenter Clinical Study to Evaluate the Efficacy, Safety and Immunogenicity of a Cell-Based Quadrivalent Subunit Influenza Virus Vaccine Compared to Non-Influenza Comparator Vaccine in Subjects ≥2 to <18 Years of Age
Study Type
Interventional

2. Study Status

Record Verification Date
October 2020
Overall Recruitment Status
Completed
Study Start Date
May 25, 2017 (Actual)
Primary Completion Date
September 30, 2019 (Actual)
Study Completion Date
September 30, 2019 (Actual)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Sponsor
Name of the Sponsor
Seqirus

4. Oversight

Studies a U.S. FDA-regulated Drug Product
Yes
Studies a U.S. FDA-regulated Device Product
No
Data Monitoring Committee
Yes

5. Study Description

Brief Summary
This Phase 3/4, randomized, observer-blind, multi-center study, stratified study evaluated the immune (antibody) response, efficacy and safety of a cell-derived quadrivalent subunit influenza virus vaccine (Seqirus QIVc) in comparison with a non-influenza comparator, meningococcal serogroup A, C, W-135, and Y (Menveo®, GlaxoSmithKline Biologicals, S.A.) in healthy pediatric subjects ≥2 Years to <18 Years of Age
Detailed Description
This Phase 3/4, randomized, observer-blind, multi-center, stratified study evaluated the efficacy, safety, and immunogenicity of a cell-derived quadrivalent subunit influenza virus vaccine (Seqirus QIVc) compared to a non-influenza comparator vaccine in healthy male and female participants between 2 to <18 years of age. A total of 4514 children/teens were randomized, receiving either QIVc or the non-influenza comparator vaccine. The comparator was (meningococcal [Groups A, C, W-135, and Y] oligosaccharide diphtheria CRM197 conjugate vaccine [Men ACWY]). Randomized enrollment was stratified in a 1:1 ratio via an Interactive Response Technology (IRT) system which assigned the participants into two age cohorts: 2 to <9 years of age and 9 to <18 years of age. Subjects between 2 to <9 years of age were further stratified by previous influenza vaccine status ("previously vaccinated" or "not previously vaccinated").

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Influenza, Human
Keywords
Influenza vaccine

7. Study Design

Primary Purpose
Prevention
Study Phase
Phase 3
Interventional Study Model
Parallel Assignment
Model Description
Phase 3/4
Masking
ParticipantCare ProviderInvestigatorOutcomes Assessor
Allocation
Randomized
Enrollment
4514 (Actual)

8. Arms, Groups, and Interventions

Arm Title
QIVc (≥2 years to <18 Years of Age)
Arm Type
Experimental
Arm Description
Cell-derived Seasonal Quadrivalent Influenza Vaccine
Arm Title
Non-Influenza Comparator Vaccine
Arm Type
Active Comparator
Arm Description
Non-Influenza Comparator Vaccine
Intervention Type
Biological
Intervention Name(s)
QIVc
Other Intervention Name(s)
Flucelvax Quadrivalent
Intervention Description
Cell-derived Quadrivalent Influenza Vaccine for intramuscular use containing each of the 2 influenza type A strains and each of the 2 influenza type B strains
Intervention Type
Biological
Intervention Name(s)
Non-influenza Comparator Vaccine
Intervention Description
Non-influenza comparator vaccine for intramuscular use
Primary Outcome Measure Information:
Title
Primary Efficacy: First Occurrence of Either RT-PCR- or Culture-confirmed Influenza (Time-to-event Analyses) Due to Any Influenza Type A or B Strain Regardless of Antigenic Match to the Strains Selected for the Seasonal Vaccine in Subjects ≥2 to <18 Years
Description
The primary efficacy endpoint was defined as the time from the last study vaccination to the onset of the first occurrence of either RT-PCR- or culture-confirmed influenza (time-to-event analyses) due to any influenza Type A or B strain regardless of antigenic match to the strains selected for the seasonal vaccine, that occurred more than 14 days after the last vaccination until the end of the influenza season. Dataset Used: FAS-Efficacy = All subjects in the All Enrolled Set who received at least one dose of study vaccine and were evaluated for efficacy from 14 days after the last vaccination. The success criterion used for this primary objective was as follows: The efficacy of the QIVc was demonstrated if the lower limit (LL) of the 2-sided 95% confidence interval (CI) for VE was above 20%.
Time Frame
Day 14 to Day 180 or until the end of the influenza season, whichever is longer
Title
Co-Primary: First Occurrence of Either RT-PCR- or Culture-confirmed Influenza (Time-to-event Analyses) Due to Any Influenza Type A or B Strain Regardless of Antigenic Match to the Strains Selected for the Seasonal Vaccine in Subjects ≥3 to <18 Years
Description
The co-primary efficacy endpoint: was defined as the time from the last study vaccination to the onset of the first occurrence of either RT-PCR- or culture-confirmed influenza (time-to-event analyses) due to any influenza Type A or B strain regardless of antigenic match to the strains selected for the seasonal vaccine, that occurred more than 14 days after the last vaccination until the end of the influenza season.Absolute vaccine efficacy of QIVc by first occurrence RT-PCR or culture confirmed influenza, due to any influenza Type A and B strain in subjects ≥3 years to <18 years of age
Time Frame
Day 14 to Day 180 or until the end of the influenza season, whichever is longer
Secondary Outcome Measure Information:
Title
Secondary Efficacy #1: First Occurrence of Either RT-PCR- or Culture-confirmed Influenza Due to Any Influenza Type A or B Strain Regardless of Antigenic Match to the Strains Selected for the Seasonal Vaccine
Description
The endpoint was defined as the time from the last study vaccination to the onset of the first occurrence of either RT-PCR- or culture-confirmed influenza due to any influenza Type A or B strain regardless of antigenic match to the strains selected for the seasonal vaccine, that occurred more than 14 days after the last vaccination until the end of the influenza season in subjects 2 to <18 years, 2 to <9 years, 4 to <18 years, and 9 to <18 years. Dataset used: FAS Efficacy = All subjects in the All Enrolled Set who received at least one dose of study vaccine and were evaluated for efficacy from 14 days after the last vaccination.
Time Frame
Day 14 to Day 180 or until the end of the influenza season, whichever is longer.
Title
Secondary Efficacy #2: First Occurrence of RT-PCR-confirmed Influenza Due to Any Influenza Type A or B Strain Regardless of Antigenic Match to the Strains Selected for the Seasonal Vaccine
Description
The endpoint was defined as the time from the last study vaccination to the onset of the first occurrence of RT-PCR-confirmed influenza due to any influenza Type A or B strain regardless of antigenic match to the strains selected for the seasonal vaccine, that occurred more than 14 days after the last vaccination until the end of the influenza season in subjects 2 to <18 years, 2 to <9 years, 4 to <18 years, and 9 to <18 years Dataset used: FAS Efficacy - All subjects in the All Enrolled Set who received at least one dose of study vaccine and were evaluated for efficacy from 14 days after the last vaccination.
Time Frame
Day 14 to Day 180 or until the end of the influenza season, whichever is longer.
Title
Secondary Efficacy #3: First Occurrence of Culture-confirmed Influenza Due to Any Influenza Type A or B Strain Regardless of Antigenic Match to the Strains Selected for the Seasonal Vaccine
Description
The secondary endpoint was defined as the time from the last study vaccination to the onset of the first occurrence of culture-confirmed influenza due to any influenza Type A or B strain regardless of antigenic match to the strains selected for the seasonal vaccine, that occurred more than 14 days after the last vaccination until the end of the influenza season in subjects 2 to <18 years, 2 to <9 years, 4 to <18 years, and 9 to <18 years. Dataset used: FAS Efficacy
Time Frame
Day 14 to Day 180 or until the end of the influenza season, whichever is longer.
Title
Secondary Efficacy #4: First Occurrence of Culture-confirmed Influenza Due to Influenza Type A or B Strain Antigenically Matched to the Strains Selected for the Seasonal Vaccine
Description
The endpoint was defined as the time from the last study vaccination to the onset of the first occurrence of culture-confirmed influenza due to influenza Type A or B strain antigenically matched to the strains selected for the seasonal vaccine, that occurred more than 14 days after the last vaccination until the end of the influenza season in subjects 2 to <18 years, 2 to <9 years, 4 to <18 years, and 9 to <18 years.
Time Frame
Day 14 to Day 180 or until the end of the influenza season, whichever is longer.
Title
Secondary Immunogenicity: Geometric Mean Titers for 4 Influenza Strains (HI Assay)
Description
Immunogenicity was characterized by HI assay 3 weeks after the last vaccination in a subset of subjects 2 to <9 years of age enrolled in Season 2 (n=432) and Season 3 (n=319) who were immunized and had immunogenicity data at the assessed timepoints (FAS Immunogenicity). Immunogenicity was assessed at baseline (Day 1; all subjects in immunogenicity subset), at Day 22 (all "previously vaccinated" subjects receiving a single dose of the study vaccine), and at Days 29 and 50 (all "not previously vaccinated" subjects receiving 2 doses) for all 4 influenza strains using the HI assay.
Time Frame
Day 1 (all subjects), Day 22 (all previously vaccinated subjects) or Day 29 and Day 50 (all not previously vaccinated subjects receiving 2 doses)
Title
ISecondary Immunogenicity: Percentage of Subjects Achieving Seroconversion for 4 Influenza Strains (HI Assay)
Description
Immunogenicity was characterized by HI assay 3 weeks after the last vaccination in a subset of subjects 2 to <9 years of age enrolled in Season 2 (n=432) and Season 3 (n=319) who were immunized and had immunogenicity data at the assessed timepoints (FAS Immunogenicity). Immunogenicity was assessed at baseline (Day 1; all subjects in immunogenicity subset), at Day 22 (all "previously vaccinated" subjects receiving a single dose of the study vaccine), and at Days 29 and 50 (all "not previously vaccinated" subjects receiving 2 doses) for all 4 influenza strains using the HI assay. Seroconversion was defined as: either a prevaccination HI titer <1:10 and a postvaccination HI titer ≥1:40 or a prevaccination HI titer ≥1:10 and a ≥4 fold increase in postvaccination HI titer) Dataset used: FAS Immunogenicity = All subjects in the All Enrolled Set who received at least one dose of study vaccine and provided evaluable serum samples at both baseline and after the last vaccination.
Time Frame
Day 22 (all previously vaccinated subjects) or Day 29 and Day 50 (all not previously vaccinated subjects)
Title
Secondary Immunogenicity: Geometric Mean Ratio for 4 Influenza Strains (HI Assay)
Description
Immunogenicity was characterized by HI assay 3 weeks after the last vaccination in a subset of subjects 2 to <9 years of age enrolled in Season 2 (n=432) and Season 3 (n=319) who were immunized and had immunogenicity data at the assessed timepoints (FAS Immunogenicity). Immunogenicity was assessed at baseline (Day 1; all subjects in immunogenicity subset), at Day 22 (all "previously vaccinated" subjects receiving a single dose of the study vaccine), and at Days 29 and 50 (all "not previously vaccinated" subjects receiving 2 doses) for all 4 influenza strains using the HI assay. Geometric mean ratios (GMRs) measure the ratio in immunogenicity titers within subject\ Dataset used: FAS Immunogenicity = All subjects in the All Enrolled Set who received at least one dose of study vaccine and provided evaluable serum samples at both baseline and after the last vaccination.
Time Frame
Day 22/Day 1 (all previously vaccinated subjects) or Day 29/Day 1 and Day 50/Day 1 (all not previously vaccinated subjects receiving 2 doses)
Title
Secondary Immunogenicity: Percentage of Subjects With HI Titer ≥1:40 for All 4 Influenza Strains (HI Assay)
Description
Immunogenicity was characterized by HI assay 3 weeks after the last vaccination in a subset of subjects 2 to <9 years of age enrolled in Season 2 (n=432) and Season 3 (n=319) who were immunized and had immunogenicity data at the assessed timepoints (FAS Immunogenicity). Immunogenicity was assessed at baseline (Day 1; all subjects in immunogenicity subset), at Day 22 (all "previously vaccinated" subjects receiving a single dose of the study vaccine), and at Days 29 and 50 (all "not previously vaccinated" subjects receiving 2 doses) for all 4 influenza strains using the HI assay. The measures for assessing immunogenicity as determined by HI were as follows: Percentage of subjects with an HI titer ≥1:40 on Day 22 (all "previously vaccinated" subjects receiving a single vaccine dose) or Days 29 and 50 (all "not previously vaccinated" subjects receiving 2 doses) for all 4 influenza strains
Time Frame
Day 1 (all subjects), Day 22 (all "previously vaccinated" subjects receiving a single vaccine dose) or Days 29 and 50 (all "not previously vaccinated"subjects receiving 2 doses)
Title
Safety: Percentage of Subjects With Solicited Local and Systemic Adverse Events for 7 Days After Vaccination
Description
The measures for assessing safety and tolerability were as follows: Percentage of subjects with solicited local and systemic adverse events (AEs) for 7 days after vaccination on Day 1 (for "previously vaccinated" subjects) or for 7 days after vaccination on Day 1 and Day 29 (for "not previously vaccinated" subjects) in the QIVc group and the non-influenza comparator vaccine group. Dataset used: Solicited Safety Set
Time Frame
days after vaccination on Day 1 (for "previously vaccinated" subjects) or for 7 days after vaccination on Day 1 and Day 29 (for "not previously vaccinated" subjects)
Title
Safety: Percentage of Subjects With Unsolicited AEs for 21 Days After Vaccination
Description
The measures for assessing safety and tolerability were as follows: Percentage of subjects with unsolicited AEs assessed from Day 1 to Day 22 (for "previously vaccinated" subjects) or from Day 1 to Day 50 (for "not previously vaccinated" subjects) in the QIVc group and the non-influenza comparator vaccine group. Dataset used: Unsolicited Safety Set (Unsolicited Adverse Events)
Time Frame
Day 1 to Day 22 (for previously vaccinated subjects) or Day 1 to Day 50 (for not previously vaccinated subjects)
Title
Safety: Subjects With SAEs, AEs Leading to Withdrawal From Vaccination and/or the Study,(MAAEs) Within 30 Days of a 1st Occurrence, Post-ILI, and NOCDs Reported During Entire Study Participation or End of Flue Season, Whichever Was Longer
Description
The measures for assessing safety and tolerability were as follows: Percentage of subjects with SAEs, AEs leading to withdrawal from vaccination and/or the study, Medically-Attended AEs (MAAEs) within 30 days after the first occurrence of an ILI, and New Onset of Chronic Diseases (NOCDs) reported during the subject's entire participation in the study (ie, from Day 1 to Day 181 [for "previously vaccinated" subjects] or from Day 1 to Day 209 [for "not previously vaccinated" subjects]), or until the end of influenza season, whichever was longer, and all medications associated with these events. Dataset used: Overall Safety Set
Time Frame
Day 1 to Day 181 (for previously vaccinated subjects) or to Day 209 (for not previously vaccinated subjects)

10. Eligibility

Sex
All
Minimum Age & Unit of Time
2 Years
Maximum Age & Unit of Time
17 Years
Accepts Healthy Volunteers
Accepts Healthy Volunteers
Eligibility Criteria
Inclusion Criteria: Male or female ≥2 to <18 years of age on the day of the first study vaccination Subject's parent(s) or legal guardian(s) who was/were able to give informed consent/dissent after the nature of the study had been explained in accordance with the practices described in the study and according to local regulatory requirements If the subject was of an age where, according to local regulations, informed assent was required, he/she must have provided assent to participate in the study Subject/subject's parent(s) or legal guardian(s) was/were able to comply with study procedures and was/were available for follow-up; and Subject was in generally good health as per the investigator's medical judgment Exclusion Criteria: Clinical signs of fever and/or an oral temperature of ≥100.4°F (38.0°C) within 3 days prior to vaccination; A known history of any anaphylaxis, serious vaccine reactions or hypersensitivity to any of the vaccine components described in the Investigator's Brochure, or had any of the contraindications listed in the package insert of the comparator vaccine; A history of Guillain-Barré syndrome or other de-myelinating diseases such as encephalomyelitis and transverse myelitis; Female subject of childbearing potential (ie, post onset of menarche and before natural or induced menopause), sexually active, and who did not use any acceptable contraceptive methods for at least 2 months prior to study entry and who did not intend to use any acceptable contraceptive methods throughout subject participation (acceptable contraceptive methods included: abstinence; hormonal contraceptive [such as oral, injection, transdermal patch, implant]; diaphragm with spermicide; tubal occlusion device; intrauterine device [IUD]; tubal ligation; male partner using condom; or male partner having been vasectomized); Pregnant or breast feeding female; Subject and/or subject's parent/guardians who were not able to comprehend or follow all required study procedures for the entire period of the study; Received prior Meningococcal ACWY vaccination that conflicted with national recommendations or local practices for the timing of the primary or the booster vaccination; Received influenza vaccination or had documented influenza disease in the last 6 months; Known or suspected congenital or acquired immunodeficiency; or received immunosuppressive therapy, such as anti-cancer chemotherapy or radiation therapy, within the preceding 6 months; or systemic corticosteroid therapy (prednisone or equivalent) at any dose for more than 2 consecutive weeks (14 days) within the past 3 months. Topical, inhaled and intra-nasal corticosteroids were permitted. Intermittent use (1 dose in 30 days) of intra-articular corticosteroids was also permitted; Administration of immunoglobulin and/or any blood products within the 3 months preceding vaccination, or administration was planned during the study; Participated in any clinical study with another investigational product within 30 days prior to first study visit or intended to participate in another clinical study at any time during the conduct of this study. Concomitant participation in an observational study (not involving drugs, vaccines, or medical devices) was acceptable; Medical conditions or treatments contraindicating IM vaccination due to increased risk of bleeding. These included known bleeding disorders (such as thrombocytopenia), or treatment with anticoagulants (such as warfarin) in the 3 weeks preceding vaccination. Antiplatelet agents such as low-dose aspirin, ticlopidine (Ticlid) and clopidogrel (Plavix) were permitted; Evidence or history (within the previous 12 months) of drug or alcohol abuse; Study personnel or immediate family members (brother, sister, child, parent), the spouse of study personnel or individuals who were financially or emotionally dependent on study staff; Participated in this study in a prior season, if applicable; or Any clinical condition that, in the opinion of the investigator, may have interfered with the results of the study or pose additional risk to the subject due to participation in the study.
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Clinical Program Director
Organizational Affiliation
Seqirus
Official's Role
Study Director
Facility Information:
Facility Name
302 AusTrials Pty Ltd
City
Sherwood
State/Province
Queensland
ZIP/Postal Code
4075
Country
Australia
Facility Name
300 Murdoch Childrens Research Institute
City
Carlton
State/Province
Victoria
ZIP/Postal Code
3010
Country
Australia
Facility Name
500 Merelahe Family Doctors Centre
City
Tallinn
State/Province
Harjumaa
ZIP/Postal Code
10617
Country
Estonia
Facility Name
504 Merekivi Family Doctors Ltd
City
Tallinn
State/Province
Harjumaa
ZIP/Postal Code
10617
Country
Estonia
Facility Name
502 Medicum AS
City
Tallinn
State/Province
Harjumaa
ZIP/Postal Code
13619
Country
Estonia
Facility Name
503 Vee Family Doctors Centre
City
Paide
State/Province
Järvamaa
ZIP/Postal Code
72713
Country
Estonia
Facility Name
505 Clinical Research Center
City
Tartu
State/Province
Tartumaa
ZIP/Postal Code
50106
Country
Estonia
Facility Name
505 Clinical Research Center
City
Tartu
Country
Estonia
Facility Name
607 Espoo Vaccine Research Clinic
City
Espoo
Country
Finland
Facility Name
603 Helsinki South Vaccine Research Clinic
City
Helsinki
Country
Finland
Facility Name
604 Helsinki South Vaccine Research Clinic
City
Helsinki
Country
Finland
Facility Name
600 Järvenpää Vaccine Research Clinic
City
Järvenpää
Country
Finland
Facility Name
606 Kokkola Vaccine Research Clinic
City
Kokkola
ZIP/Postal Code
67100
Country
Finland
Facility Name
605 Oulu Vaccine Research Clinic
City
Oulu
Country
Finland
Facility Name
601 Pori Vaccine Research Clinic
City
Pori
Country
Finland
Facility Name
602 Seinäjoki Vaccine Research Clinic
City
Seinäjoki
Country
Finland
Facility Name
608 Tampere Vaccine Research Clinic
City
Tampere
Country
Finland
Facility Name
609 Turku Vaccine Research Clinic
City
Turku
Country
Finland
Facility Name
706 Private Office of Children Pulmonologist
City
Alytus
State/Province
Alytus Apskritis
ZIP/Postal Code
62142
Country
Lithuania
Facility Name
704 Kauno klinikine ligonine
City
Kaunas
State/Province
Kauno Apskritis
ZIP/Postal Code
47116
Country
Lithuania
Facility Name
703 UAB InMedica
City
Kaunas
State/Province
Kauno Apskritis
ZIP/Postal Code
48259
Country
Lithuania
Facility Name
702 JSC Saules seimos medicinos centras
City
Kaunas
State/Province
Kauno Apskritis
ZIP/Postal Code
49449
Country
Lithuania
Facility Name
700 Kaunas Silainiai Outpatient Clinic
City
Kaunas
State/Province
Kauno Apskrits
ZIP/Postal Code
48259
Country
Lithuania
Facility Name
701 Naujininkai Outpatient Clinic
City
Vilnius
State/Province
Vilnaius Apskritis
ZIP/Postal Code
02169
Country
Lithuania
Facility Name
402 De La Salle Health Sciences Institute
City
Dasmarinas
State/Province
Cavite
ZIP/Postal Code
4114
Country
Philippines
Facility Name
405 De La Salle Health Sciences Institute
City
Dasmarinas
State/Province
Cavite
ZIP/Postal Code
4114
Country
Philippines
Facility Name
403 Philippine General Hospital
City
Manila
State/Province
National Capital Region
ZIP/Postal Code
1000
Country
Philippines
Facility Name
404 Philippine General Hospital
City
Manila
State/Province
National Capital Region
ZIP/Postal Code
1000
Country
Philippines
Facility Name
400 Research Institute For Tropical Medicine
City
Muntinlupa
State/Province
National Capital Region
ZIP/Postal Code
1781
Country
Philippines
Facility Name
401 Research Institute For Tropical Medicine
City
Muntinlupa
State/Province
National Capital Region
ZIP/Postal Code
1781
Country
Philippines
Facility Name
406 Research Institute For Tropical Medicine
City
Muntinlupa
State/Province
National Capital Region
ZIP/Postal Code
1781
Country
Philippines
Facility Name
803 Szpital im. Sw. Jadwigi Slaskiej w Trzebnicy
City
Trzebnica
State/Province
Dolnoslaskie
ZIP/Postal Code
55-100
Country
Poland
Facility Name
805 Szpital Uniwersytecki nr 2 im. dr. Jana Biziela w Bydgoszczy
City
Bydgoszcz
State/Province
Kujawsko-pomorskie
ZIP/Postal Code
85-168
Country
Poland
Facility Name
800 Niepubliczny Zaklad Opieki Zdrowotnej (NZOZ) "Salmed" s. c.
City
Leczna
State/Province
Lubelskie
ZIP/Postal Code
21-010
Country
Poland
Facility Name
806 Specjalistyczny Szpital im. E. Szczeklika w Tarnowie
City
Tarnow
State/Province
Malopolskie
ZIP/Postal Code
33-100
Country
Poland
Facility Name
804 Prywatny Gabinet Lekarski
City
Debica
State/Province
Podkarpackie
ZIP/Postal Code
39-200
Country
Poland
Facility Name
NZLA Michalkowice - Jarosz i Partnerzy Spolka Lekarska
City
Siemianowice Slaskie
State/Province
Slaskie
ZIP/Postal Code
41-103
Country
Poland
Facility Name
900 Complejo Hospitalario Universitario de Santiago
City
Santiago de Compostela
State/Province
A Coruña
ZIP/Postal Code
15706
Country
Spain
Facility Name
200 Srinagarind Hospital, Khon Kaen University
City
Khon Kaen
State/Province
Muang
ZIP/Postal Code
40002
Country
Thailand
Facility Name
201 ChiangMai University
City
Chiang Mai
ZIP/Postal Code
50200
Country
Thailand

12. IPD Sharing Statement

Plan to Share IPD
Yes
IPD Sharing Plan Description
Seqirus supports the release of anonymized subject-level and study-level data in compliance with regulatory requirements, including Clinical Documents which are part of the CTD modules submitted to regulatory agencies for public release. Summary results disclosure is either in document form (e.g., ICH E3 Clinical Study Report synopsis) or structured data form (such as summary results in ClinicalTrials.gov (United States) or eudract.ema.europa.eu (EU Clinical Trial Registry [EU CTR]).
IPD Sharing Time Frame
Seqirus aims to disclose these results from clinical studies within twelve (12) months of the Study Completion unless otherwise mandated by local law or regulation.
IPD Sharing Access Criteria
All requests will be fully vetted and data to be released approved, prior to distribution. Seqirus does not release subject-level data and study-level data if the requester's purpose is to conduct a re-analysis of the study data, as opposed to a meta-analysis. While the URL link below does not outline the data sharing policy per se, it does present a high-level view of how the organization partners with external collaborators
IPD Sharing URL
https://www.seqirus.com/partnering
Citations:
PubMed Identifier
34644472
Citation
Nolan T, Fortanier AC, Leav B, Poder A, Bravo LC, Szymanski HT, Heeringa M, Vermeulen W, Matassa V, Smolenov I, Edelman JM. Efficacy of a Cell-Culture-Derived Quadrivalent Influenza Vaccine in Children. N Engl J Med. 2021 Oct 14;385(16):1485-1495. doi: 10.1056/NEJMoa2024848.
Results Reference
derived

Learn more about this trial

Clinical Study to Evaluate the Efficacy, Safety and Immunogenicity of QIVc in Subjects ≥2 to <18 Years of Age

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