AzTrials
AzTrials

InfluenzaPhase 1NCT03553940

H3N2 M2SR in Pediatric Population

A Phase 1 study testing Influenza Virus Monovalent A/H3N2/Bris 10 M2SR Live Vaccine and Quadrivalent MDCK Inactivated Influenza Vaccine in people with Influenza and Influenza Immunisation, run by National Institute of Allergy and Infectious Diseases (NIAID) at 1 site in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

This is a Phase I double-blind, randomized, placebo-controlled study in 50 healthy adolescents and children, 9-17 years of age, inclusive, who are in good health and meet all eligibility criteria. Read more about this study

Who is it for?
Ages 9 to 17 yearsHealthy volunteers can take part
Conditions the study is for
Influenza, Influenza Immunisation
What is being tested?
Influenza Virus Monovalent A/H3N2/Bris 10 M2SR Live Vaccine and Quadrivalent MDCK Inactivated Influenza Vaccine
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
43 participants
Where
1 siteUnited States
Study dates
15 Aug 2018to 27 Aug 2020
Phase
Phase 1
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 9 to 17 years
  • All sexes
  • Healthy volunteers accepted
  • Child

Who may be able to join

  • Parent(s)/legal guardian(s) must provide written informed consent prior to initiation of any study procedures, and subject must provide assent.
  • Are able to understand and comply with planned study procedures and be available for all study visits.
  • Are males or non-pregnant females, 9-17 years old, inclusive at the time of enrollment.
  • Are in good health*.
  • As determined by medical history and physical examination to evaluate acute or currently ongoing chronic medical diagnoses or conditions, defined as those that have been present for at least 90 days, which would affect the assessment of the safety of subjects or the immunogenicity of study vaccinations. Chronic medical diagnoses or conditions should be stable for the last 60 days (no hospitalizations, ER, or urgent care for condition and no adverse symptoms that need medical intervention). This includes no change in chronic prescription medication, dose, or frequency as a result of deterioration of the chronic medical diagnosis or condition in the 60 days prior to enrollment. Any prescription change that is due to change of health care provider, insurance company, etc., or that is done for financial reasons, as long as in the same class of medication, will not be considered a deviation of this inclusion criterion. Any change in prescription medication due to improvement of a disease outcome, as determined by the site principal investigator or appropriate sub-investigator, will not be considered a deviation of this inclusion criterion. Subjects may be on chronic or as needed (prn) medications if, in the opinion of the site principal investigator or appropriate sub-investigator, they pose no additional risk to subject safety or assessment of reactogenicity and immunogenicity and do not indicate a worsening of medical diagnosis or condition. Similarly, medication changes subsequent to enrollment and study vaccination are acceptable provided there was no deterioration in the subject's chronic medical condition that necessitated a medication change, and there is no additional risk to the subject or interference with the evaluation of responses to study vaccination. Note: Low dose topical steroids, herbals, vitamins, and supplements are permitted.
  • Oral temperature is less than 100.0 degrees Fahrenheit.
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  • For female adolescent of child-bearing potential* must agree to correctly use an acceptable method of contraception** from 30 days prior to vaccination until 30 days after the last study vaccination.
  • Defined by the onset of menses, and not sterilized via tubal ligation, bilateral oophorectomy, hysterectomy, or successful Essure(R) placement (permanent, non-surgical, non-hormonal sterilization) with documented radiological confirmation test at least 90 days after the procedure, and still menstruating.
  • Includes non-male sexual relationships, abstinence from sexual intercourse with a male partner, monogamous relationship with a vasectomized partner, and correct use of male condoms with the use of applied spermicide, intrauterine devices, NuvaRing(R), and licensed hormonal methods such as implants, injectables, contraceptive patches or oral contraceptives ("the pill"). Method of contraception will be captured on the appropriate data collection form.
  • Female adolescent of childbearing potential must have a negative urine pregnancy test within 24 hours prior to study vaccination.
  • Males who are sexually active with a female of childbearing potential must agree not to father a child for 30 days after receipt of the first study vaccination.
  • Agrees not to participate in another clinical trial during the study period.
  • Agrees not to donate blood or blood products to a blood bank for 12 months after receiving the investigational vaccine.
  • Weight = / > 34 kg or 75 pounds.
  • Hemoglobin = / > 11.5 g/dL.
  • Hematocrit > 35%.
  • Ferritin level = / > 15 ng/mL.
  • Parent/legal guardian must provide consent to future use of stored samples.

Who cannot join

  • Have an acute illness*, as determined by the site PI or appropriate sub-investigator, within 72 hours prior to each study vaccination.
  • An acute illness which is nearly resolved with only minor residual symptoms remaining is allowable if, in the opinion of the site PI or appropriate sub-investigator, the residual symptoms will not interfere with the ability to assess safety parameters as required by the protocol.
  • Have any medical disease or condition that, in the opinion of the site PI or appropriate sub-investigator, is a contraindication to study participation*.
  • Including acute or chronic medical disease or condition, defined as persisting for at least 90 days, that would place the subject at an unacceptable risk of injury, render the subject unable to meet the requirements of the protocol, or may interfere with the evaluation of responses or the subject's successful completion of this study.
  • Have immunosuppression as a result of an underlying illness or treatment, or use of anticancer chemotherapy or radiation therapy (cytotoxic) within 3 years prior to study vaccination.
  • Have known active neoplastic disease or a history of any hematologic malignancy. Non-melanoma skin cancers that are not active are permitted.
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  • Have known HIV, hepatitis B, or hepatitis C infection.
  • Have a history of severe reactions following previous immunization with licensed or unlicensed influenza vaccines.
  • History of anatomic disorder of the nares or nasopharynx (Deviated septum is allowed).
  • History of chronic sinus infections.
  • Have a history of Guillain-Barre Syndrome.
  • Have a history of alcohol or drug abuse prior to study vaccination.
  • Have any diagnosis, current or past, of schizophrenia, bipolar disease, or other psychiatric diagnosis that may interfere with subject compliance or safety evaluations.
  • Have been hospitalized for psychiatric illness, history of suicide attempt, or confinement for danger to self or others prior to study vaccination.
  • Have taken oral and/or nasal corticosteroids of any dose within 30 days prior to each study vaccination or plan to take in the 30 days following the first study vaccination.
  • Have taken high-dose*,** inhaled corticosteroids within 30 days (prior to study vaccination).
  • High-dose defined as per age as using inhaled high dose per reference chart.
  • https://www.nhlbi.nih.gov/files/docs/guidelines/asthmaorg.pdf.
  • Use of aspirin or salicylate-containing products 30 days prior to the first vaccination.
  • Recurring or active wheezing or diagnosis of asthma, or history of significant wheezing*.
  • Medically significant wheezing: defined as wheezing on physical exam plus sign of respiratory distress (tachypnea, retractions, or dyspnea), hypoxemia (O2 saturation < 95%), or new bronchodilator prescription, or use of daily bronchodilator therapy (not on an "as needed" basis).
  • Received any licensed live or inactivated vaccine within 30 days prior to or plan to receive any licensed live or inactivated vaccine within 30 days after each study vaccination.
  • Received any influenza vaccine (inactivated or live) within 6 months prior to the first study vaccination and until the end of the study.
  • Received immunoglobulin or other blood products within 6 months prior to study vaccination.
  • Received an experimental agent* within 30 days prior to the first study vaccination, or expects to receive an experimental agent** during the 12-month trial-reporting period.
  • Including vaccine, drug, biologic, device, blood product, or medication.
  • Other than from participation in this study.
  • Are participating or plan to participate in another clinical trial with an interventional agent* that will be received during the 12-month trial-reporting period.
  • Including agent (licensed or unlicensed vaccine, drug, biologic, device, blood product, or medication) during the 12-month study period.
  • Prior history of H3N2 actual or potential exposure or infection prior to the first study vaccination, or receipt of experimental vaccines within the past year prior to the first study vaccine.
  • Female adolescent subject who is breastfeeding or plans to breastfeed at any given time from the first study vaccination until 30 days after the last study vaccination.
  • Blood donation within 30 days prior to the study vaccination through 30 days after the last blood drawn for this study.
  • Have signs or symptoms that could confound or confuse assessment of study vaccine reactogenicity*.
  • The study vaccination should be postponed/deferred until signs or symptoms have resolved and if within the acceptable protocol-specified window for that visit.
  • Have received any antiviral drug within 3 days of study vaccination.

Trial locations and contacts

1 site in 1 country.

United States1 site

  • Saint Louis University - Center for Vaccine Development

    St Louis, Missouri, 63104-1015

Other trials in United States

About this study

Official title: A Phase I Trial to Evaluate the Safety and Immunogenicity of an Influenza Vaccination Strategy Including a H3N2 M2SR Prime Followed by a Seasonal Quadrivalent Inactivated Vaccine Boost in a Pediatric Population 9-17 Years Old

This is a Phase I double-blind, randomized, placebo-controlled study in 50 healthy adolescents and children, 9-17 years of age, inclusive, who are in good health and meet all eligibility criteria. This clinical trial is designed to assess the safety and immunogenicity of a prime-boost regimen of H3N2 M2SR intranasal influenza vaccine (manufactured by FluGen) followed by licensed inactivated Quadrivalent Influenza Vaccine (QIV) boost administered intramuscularly Subjects will be enrolled in one of two groups in a 1:1 ratio. Arm 1 will receive one dose of M2SR intranasally on Day 1 and one dose of QIV on Day 92. Arm 2 will receive one dose of placebo (saline) intranasally on Day 1, and one dose of QIV on Day 92. Study duration will be approximately 28 months with patient participation duration approximately 13 months. The primary study objective is to assess the safety and reactogenicity of a monovalent live attenuated influenza H3N2 M2SR vaccine.

Read the detailed description

This is a Phase I double-blind, randomized, placebo-controlled study in 50 healthy adolescents and children, 9-17 years of age, inclusive, who are in good health and meet all eligibility criteria. This clinical trial is designed to assess the safety and immunogenicity of a prime-boost regimen of H3N2 M2SR intranasal influenza vaccine (manufactured by FluGen) followed by licensed inactivated Quadrivalent Influenza Vaccine (QIV) boost administered intramuscularly. Subjects will be enrolled in one of two groups in a 1:1 ratio. Arm 1 will receive one dose of M2SR intranasally on Day 1 and one dose of QIV on Day 92. Arm 2 will receive one dose of placebo (saline) intranasally on Day 1, and one dose of QIV on Day 92. Study duration will be approximately 28 months with patient participation duration approximately 13 months. The primary study objective is to assess the safety and reactogenicity of a monovalent live attenuated influenza H3N2 M2SR vaccine. The secondary study objectives are to identify circulating and mucosal antibody responses induced by H3N2 M2SR vaccination and to identify cellular immune responses induced by H3N2 M2SR vaccination.

Being tested
Influenza Virus Monovalent A/H3N2/Bris 10 M2SR Live Vaccine, Placebo, Quadrivalent MDCK Inactivated Influenza Vaccine
Keywords
H3N2 M2SR Prime, Immunogenicity, Influenza, Pediatric Population, QIV, Safety, Vaccine
Medical subject headings
Influenza, Human

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Influenza Virus Monovalent A/H3N2/Bris 10 M2SR Live VaccineBiological

    Live monovalent influenza A/H3N2-based M2SR (M2 defective Single Replication vaccine), comprised of 5 out of 8 gene segments on the donor virus influenza A/Puerto Rica/8/34. HA and NA derive from an A/Brisbane/10/2007-like virus. Administered intranasally as s single dose.

  • PlaceboOther

    H3N2 M2SR vaccine placebo (normal saline). Administered intranasally as a single dose.

  • Quadrivalent MDCK Inactivated Influenza VaccineBiological

    A quadrivalent cell culture inactivated vaccine (ccIV4) is an inactivated subunit influenza vaccine prepared from virus propagated in Madin Darby Canine Kidney (MDCK) cells indicated for the prevention of influenza disease caused by influenza virus subtypes A and type B contained in the vaccine. Administered intramuscularly as a single dose.

Study groups in NCT03553940
Study groupRoleWhat they receive
Arm 1ExperimentalA single dose of monovalent live attenuated influenza H3N2 M2SR vaccine (M2SR) administered intranasally on Day 1, and a single dose of licensed quadrivalent influenza vaccine (QIV) administered intramuscularly on Day 92. N=25
Receives: Biological: Influenza Virus Monovalent A/H3N2/Bris 10 M2SR Live Vaccine; Biological: Quadrivalent MDCK Inactivated Influenza Vaccine
Arm 2Placebo comparatorA single dose of Placebo administered intranasally on Day 1, and a single dose of licensed QIV administered intramuscularly on Day 92. N=25
Receives: Other: Placebo; Biological: Quadrivalent MDCK Inactivated Influenza Vaccine

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Number of Participants With Adverse Events of Special Interest (AESIs)

    Adverse Events of Special Interest (AESIs) included medically significant wheezing and otitis media. AESIs were collected from receipt of the first study vaccination through 3 months after first vaccination.

    Measured: Day 1 through Day 92

  2. Number of Participants With New Onset Chronic Medical Conditions (NOCMCs)

    Participants were queried at each visit for the occurrence of new onset chronic medical conditions (NOCMCs). NOCMCs were collected from receipt of the first study vaccination through 3 months after first vaccination.

    Measured: Day 1 through Day 92

  3. Number of Participants With Serious Adverse Events (SAEs)

    SAEs included any untoward medical occurrence that resulted in death; was life threatening; was a persistent/significant disability/incapacity; required inpatient hospitalization or prolongation or a congenital anomaly/birth defect.

    Measured: Day 1 through Day 366

  4. Number of Participants With Solicited Reactogenicity

    Reactogenicity assessments included an assessment of solicited AEs occurring from the time of first study vaccination through 7 days after first vaccination. For upper respiratory symptoms, this included an assessment of runny nose, stuffy nose/ congestion, sneezing, nasal pain/irritation/nasal dryness, nasal bleeding/epistaxis, sinus pressure/pain, sore throat/sore/scratchy, itchy or painful throat, cough, and trouble breathing/shortness of breath. For general systemic symptoms, this included an assessment of reactions including fever, feverishness (chills/shivering/sweating), fatigue (tiredness), malaise, myalgia (body aches/muscular pain), arthralgia (joint pain), headache, flushing, decreased activity, decreased appetite, abdominal pain, nausea, vomiting, diarrhea, eye pruritus, eye redness (conjunctivitis), allergy, and wheezing.

    Measured: Day 1 through Day 8

  5. Number of Participants With Unsolicited Non-Serious Adverse Events

    Adverse events were defined as any untoward medical occurrence in a participant administered a pharmaceutical product regardless of its causal relationship to the study treatment. Non-serious AEs were collected from the time of first study vaccination through 21 days after first vaccination. Adverse events were MedDRA coded and are summarized by MedDRA System Organ Class (SOC).

    Measured: Day 1 through Day 22

Secondary outcomes (53)

  1. Frequency of Conserved Internal Viral Protein-specific Spot Forming Cells

    Blood was collected for ELISpot assays conducted with a peptide library consisting of conserved immunogenic peptides of internal flu virus proteins as the antigen . Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). Peripheral blood mononuclear cells (PBMCs) were harvested and retained from each whole blood collection. The geometric mean of each sample's replicate results was calculated from available results using spot forming cells per 3x10^5 peripheral blood mononuclear cells (SFC/3x10^5 PBMCs).

    Measured: Day 1 through Day 113

  2. Frequency of Influenza H3 HA-specific Spot Forming Cells for the H3N2 M2SR-like Virus A/Brisbane/10/2007

    Blood was collected for ELISpot assays conducted with H3N2 M2SR-like virus A/Brisbane/10/2007 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). Peripheral blood mononuclear cells (PBMCs) were harvested and retained from each whole blood collection. The geometric mean of each sample's replicate results was calculated from available results using spot forming cells per 3x10^5 peripheral blood mononuclear cells (SFC/3x10^5 PBMCs).

    Measured: Day 1 through Day 113

  3. Frequency of Influenza H3 HA-specific Spot Forming Cells for the H3N2 QIV-like Virus A/North Carolina/04/2016

    Blood was collected for ELISpot assays conducted with H3N2 QIV-like virus A/North Carolina/04/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). Peripheral blood mononuclear cells (PBMCs) were harvested and retained from each whole blood collection. The geometric mean of each sample's replicate results was calculated from available results using spot forming cells per 3x10^5 peripheral blood mononuclear cells (SFC/3x10^5 PBMCs).

    Measured: Day 1 through Day 113

  4. Frequency of Influenza H3 HA-specific Spot Forming Cells for the H3N2 QIV-like Virus A/Singapore/INFIMH-16-0019/2016

    Blood was collected for ELISpot assays conducted with H3N2 QIV-like virus A/Singapore/INFIMH-16-0019/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). Peripheral blood mononuclear cells (PBMCs) were harvested and retained from each whole blood collection. The geometric mean of each sample's replicate results was calculated from available results using spot forming cells per 3x10^5 peripheral blood mononuclear cells (SFC/3x10^5 PBMCs).

    Measured: Day 1 through Day 113

  5. Frequency of Influenza H3 HA-specific Spot Forming Cells for the H3N2 QIV-like Virus A/Kansas/14/2017

    Blood was collected for ELISpot assays conducted with H3N2 QIV-like virus A/Kansas/14/2017 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). Peripheral blood mononuclear cells (PBMCs) were harvested and retained from each whole blood collection. The geometric mean of each sample's replicate results was calculated from available results using spot forming cells per 3x10^5 peripheral blood mononuclear cells (SFC/3x10^5 PBMCs).

    Measured: Day 1 through Day 113

  6. Geometric Mean Fold Rise (GMFR) of Nasal Secretory Immunoglobulin A (sIgA) Responses Directed Against the H3N2 M2SR-like Virus A/Brisbane/10/2007

    Nasal swabs were collected for secretory immunoglobulin A (sIgA) assays conducted with H3N2 M2SR-like virus A/Brisbane/10/2007 as the antigen. Collection took place Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Geometric mean fold rise (GMFR) was calculated by dividing each post-baseline geometric mean titer by baseline geometric mean titer. The GMFR across samples was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  7. Geometric Mean Fold Rise (GMFR) of Nasal Secretory Immunoglobulin A (sIgA) Responses Directed Against the H3N2 M2SR-like Virus A/Brisbane/10/2007 Normalized to Total sIgA

    Nasal swabs were collected for secretory immunoglobulin A (sIgA) assays conducted with H3N2 M2SR-like virus A/Brisbane/10/2007 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Results were normalized to total sIgA by dividing each geometric mean titer by total sIgA concentration (ng/mL). Geometric mean fold rise (GMFR) was calculated by dividing each post-baseline normalized geometric mean titer by baseline normalized geometric mean titer. The GMFR across samples was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  8. Geometric Mean Fold Rise (GMFR) of Nasal Secretory Immunoglobulin A (sIgA) Responses Directed Against the H3N2 QIV-like Virus A/North Carolina/04/2016

    Nasal swabs were collected for secretory immunoglobulin A (sIgA) assays conducted with H3N2 QIV-like virus A/North Carolina/04/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Geometric mean fold rise (GMFR) was calculated by dividing each post-baseline geometric mean titer by baseline geometric mean titer. The GMFR across samples was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  9. Geometric Mean Fold Rise (GMFR) of Nasal Secretory Immunoglobulin A (sIgA) Responses Directed Against the H3N2 QIV-like Virus A/North Carolina/04/2016 Normalized to Total sIgA

    Nasal swabs were collected for secretory immunoglobulin A (sIgA) assays conducted with H3N2 QIV-like virus A/North Carolina/04/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Results were normalized to total sIgA by dividing each geometric mean titer by total sIgA concentration (ng/mL). Geometric mean fold rise (GMFR) was calculated by dividing each post-baseline normalized geometric mean titer by baseline normalized geometric mean titer. The GMFR across samples was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  10. Geometric Mean Fold Rise (GMFR) of Nasal Secretory Immunoglobulin A (sIgA) Responses Directed Against the H3N2 QIV-like Virus A/Singapore/INFIMH-16-0019/2016

    Nasal swabs were collected for secretory immunoglobulin A (sIgA) assays conducted with H3N2 QIV-like virus A/Singapore/INFIMH-16-0019/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Geometric mean fold rise (GMFR) was calculated by dividing each post-baseline geometric mean titer by baseline geometric mean titer. The GMFR across samples was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  11. Geometric Mean Fold Rise (GMFR) of Nasal Secretory Immunoglobulin A (sIgA) Responses Directed Against the H3N2 QIV-like Virus A/Singapore/INFIMH-16-0019/2016 Normalized to Total sIgA

    Nasal swabs were collected for secretory immunoglobulin A (sIgA) assays conducted with H3N2 QIV-like virus A/Singapore/INFIMH-16-0019/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Results were normalized to total sIgA by dividing each geometric mean titer by total sIgA concentration (ng/mL). Geometric mean fold rise (GMFR) was calculated by dividing each post-baseline normalized geometric mean titer by baseline normalized geometric mean titer. The GMFR across samples was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  12. Geometric Mean Fold Rise (GMFR) of Nasal Secretory Immunoglobulin A (sIgA) Responses Directed Against the H3N2 QIV-like Virus A/Kansas/14/2017

    Nasal swabs were collected for secretory immunoglobulin A (sIgA) assays conducted with H3N2 QIV-like virus A/Kansas/14/2017 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Geometric mean fold rise (GMFR) was calculated by dividing each post-baseline geometric mean titer by baseline geometric mean titer. The GMFR across samples was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  13. Geometric Mean Fold Rise (GMFR) of Nasal Secretory Immunoglobulin A (sIgA) Responses Directed Against the H3N2 QIV-like Virus A/Kansas/14/2017 Normalized to Total sIgA

    Nasal swabs were collected for secretory immunoglobulin A (sIgA) assays conducted with H3N2 QIV-like virus A/Kansas/14/2017 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Results were normalized to total sIgA by dividing each geometric mean titer by total sIgA concentration (ng/mL). Geometric mean fold rise (GMFR) was calculated by dividing each post-baseline normalized geometric mean titer by baseline normalized geometric mean titer. The GMFR across samples was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  14. Geometric Mean Titer (GMT) of Nasal Secretory Immunoglobulin A (sIgA) Responses Directed Against the H3N2 M2SR-like Virus A/Brisbane/10/2007

    Nasal swabs were collected for secretory immunoglobulin A (sIgA) assays conducted with H3N2 M2SR-like virus A/Brisbane/10/2007 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The geometric mean titer (GMT) across samples was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  15. Geometric Mean Titer (GMT) of Nasal Secretory Immunoglobulin A (sIgA) Responses Directed Against the H3N2 M2SR-like Virus A/Brisbane/10/2007 Normalized to Total sIgA

    Nasal swabs were collected for secretory immunoglobulin A (sIgA) assays conducted with H3N2 M2SR-like virus A/Brisbane/10/2007 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Results were normalized to total sIgA by dividing each geometric mean titer by total sIgA concentration (ng/ml). The geometric mean titer (GMT) across samples was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  16. Geometric Mean Titer (GMT) of Nasal Secretory Immunoglobulin A (sIgA) Responses Directed Against the H3N2 QIV-like Virus A/North Carolina/04/2016

    Nasal swabs were collected for secretory immunoglobulin A (sIgA) assays conducted with H3N2 QIV-like virus A/North Carolina/04/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The geometric mean titer (GMT) across samples was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  17. Geometric Mean Titer (GMT) of Nasal Secretory Immunoglobulin A (sIgA) Responses Directed Against the H3N2 QIV-like Virus A/North Carolina/04/2016 Normalized to Total sIgA

    Nasal swabs were collected for secretory immunoglobulin A (sIgA) assays conducted with H3N2 QIV-like virus A/North Carolina/04/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Results were normalized to total sIgA by dividing each geometric mean titer by total sIgA concentration (ng/ml). The geometric mean titer (GMT) across samples was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  18. Geometric Mean Titer (GMT) of Nasal Secretory Immunoglobulin A (sIgA) Responses Directed Against the H3N2 QIV-like Virus A/Singapore/INFIMH-16-0019/2016

    Nasal swabs were collected for secretory immunoglobulin A (sIgA) assays conducted with H3N2 QIV-like virus A/Singapore/INFIMH-16-0019/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The geometric mean titer (GMT) across samples was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  19. Geometric Mean Titer (GMT) of Nasal Secretory Immunoglobulin A (sIgA) Responses Directed Against the H3N2 QIV-like Virus A/Singapore/INFIMH-16-0019/2016 Normalized to Total sIgA

    Nasal swabs were collected for secretory immunoglobulin A (sIgA) assays conducted with H3N2 QIV-like virus A/Singapore/INFIMH-16-0019/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Results were normalized to total sIgA by dividing each geometric mean titer by total sIgA concentration (ng/ml). The geometric mean titer (GMT) across samples was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  20. Geometric Mean Titer (GMT) of Nasal Secretory Immunoglobulin A (sIgA) Responses Directed Against the H3N2 QIV-like Virus A/Kansas/14/2017

    Nasal swabs were collected for secretory immunoglobulin A (sIgA) assays conducted with H3N2 QIV-like virus A/Kansas/14/2017 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The geometric mean titer (GMT) across samples was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  21. Geometric Mean Titer (GMT) of Nasal Secretory Immunoglobulin A (sIgA) Responses Directed Against the H3N2 QIV-like Virus A/Kansas/14/2017 Normalized to Total sIgA

    Nasal swabs were collected for secretory immunoglobulin A (sIgA) assays conducted with H3N2 QIV-like virus A/Kansas/14/2017 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Results were normalized to total sIgA by dividing each geometric mean titer by total sIgA concentration (ng/ml). The geometric mean titer (GMT) across samples was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  22. Hemagglutination Inhibition (HAI) Antibody Geometric Mean Fold Rise (GMFR) to the H3N2 M2SR-like Virus A/Brisbane/10/2007

    Blood was collected for HAI assays conducted with H3N2 M2SR-like virus A/Brisbane/10/2007 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Geometric mean fold rise (GMFR) was calculated by dividing each post-baseline geometric mean titer by baseline geometric mean titer. The GMFR across samples was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  23. Hemagglutination Inhibition (HAI) Antibody Geometric Mean Fold Rise (GMFR) to the H3N2 QIV-like Virus A/North Carolina/04/2016

    Blood was collected for HAI assays conducted with H3N2 QIV-like virus A/North Carolina/04/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Geometric mean fold rise (GMFR) was calculated by dividing each post-baseline geometric mean titer by baseline geometric mean titer. The GMFR across samples was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  24. Hemagglutination Inhibition (HAI) Antibody Geometric Mean Fold Rise (GMFR) to the H3N2 QIV-like Virus A/Singapore/INFIMH-16-0019/2016

    Blood was collected for HAI assays conducted with H3N2 QIV-like virus A/Singapore/INFIMH-16-0019/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Geometric mean fold rise (GMFR) was calculated by dividing each post-baseline geometric mean titer by baseline geometric mean titer. The GMFR across samples was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  25. Hemagglutination Inhibition (HAI) Antibody Geometric Mean Fold Rise (GMFR) to the H3N2 QIV-like Virus A/Kansas/14/2017

    Blood was collected for HAI assays conducted with H3N2 QIV-like virus A/Kansas/14/2017 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Geometric mean fold rise (GMFR) was calculated by dividing each post-baseline geometric mean titer by baseline geometric mean titer. The GMFR across samples was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  26. Hemagglutination Inhibition (HAI) Antibody Geometric Mean Titers (GMTs) to the H3N2 M2SR-like Virus A/Brisbane/10/2007

    Blood was collected for HAI assays conducted with H3N2 M2SR-like virus A/Brisbane/10/2007 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The geometric mean titer (GMT) across samples was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  27. Hemagglutination Inhibition (HAI) Antibody Geometric Mean Titers (GMTs) to the H3N2 QIV-like Virus A/North Carolina/04/2016

    Blood was collected for HAI assays conducted with H3N2 QIV-like virus A/North Carolina/04/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The geometric mean titer (GMT) across samples was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  28. Hemagglutination Inhibition (HAI) Antibody Geometric Mean Titers (GMTs) to the H3N2 QIV-like Virus A/Singapore/INFIMH-16-0019/2016

    Blood was collected for HAI assays conducted with H3N2 QIV-like virus A/Singapore/INFIMH-16-0019/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The geometric mean titer (GMT) across samples was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  29. Hemagglutination Inhibition (HAI) Antibody Geometric Mean Titers (GMTs) to the H3N2 QIV-like Virus A/Kansas/14/2017

    Blood was collected for HAI assays conducted with H3N2 QIV-like virus A/Kansas/14/2017 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The geometric mean titer (GMT) across samples was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  30. Neutralizing Antibody Geometric Mean Fold Rise (GMFR) to the H3N2 M2SR-like Virus A/Brisbane/10/2007

    Blood was collected for Neutralizing assays conducted with H3N2 M2SR-like virus A/Brisbane/10/2007 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Geometric mean fold rise (GMFR) was calculated by dividing each post-baseline geometric mean titer by baseline geometric mean titer. The GMFR across samples was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  31. Neutralizing Antibody Geometric Mean Fold Rise (GMFR) to the H3N2 QIV-like Virus A/North Carolina/04/2016

    Blood was collected for Neutralizing assays conducted with H3N2 QIV-like virus A/North Carolina/04/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Geometric mean fold rise (GMFR) was calculated by dividing each post-baseline geometric mean titer by baseline geometric mean titer. The GMFR across samples was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  32. Neutralizing Antibody Geometric Mean Fold Rise (GMFR) to the H3N2 QIV-like Virus A/Singapore/INFIMH-16-0019/2016

    Blood was collected for Neutralizing assays conducted with H3N2 QIV-like virus A/Singapore/INFIMH-16-0019/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Geometric mean fold rise (GMFR) was calculated by dividing each post-baseline geometric mean titer by baseline geometric mean titer. The GMFR across samples was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  33. Neutralizing Antibody Geometric Mean Fold Rise (GMFR) to the H3N2 QIV-like Virus A/Kansas/14/2017

    Blood was collected for Neutralizing assays conducted with H3N2 QIV-like virus A/Kansas/14/2017 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Geometric mean fold rise (GMFR) was calculated by dividing each post-baseline geometric mean titer by baseline geometric mean titer. The GMFR across samples was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  34. Neutralizing Antibody Geometric Mean Titers (GMTs) to the H3N2 M2SR-like Virus A/Brisbane/10/2007

    Blood was collected for Neutralizing assays conducted with H3N2 M2SR-like virus A/Brisbane/10/2007 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The geometric mean titer (GMT) across samples was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  35. Neutralizing Antibody Geometric Mean Titers (GMTs) to the H3N2 QIV-like Virus A/North Carolina/04/2016

    Blood was collected for Neutralizing assays conducted with H3N2 QIV-like virus A/North Carolina/04/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The geometric mean titer (GMT) across samples was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  36. Neutralizing Antibody Geometric Mean Titers (GMTs) to the H3N2 QIV-like Virus A/Singapore/INFIMH-16-0019/2016

    Blood was collected for Neutralizing assays conducted with H3N2 QIV-like virus A/Singapore/INFIMH-16-0019/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The geometric mean titer (GMT) across samples was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  37. Neutralizing Antibody Geometric Mean Titers (GMTs) to the H3N2 QIV-like Virus A/Kansas/14/2017

    Blood was collected for Neutralizing assays conducted with H3N2 QIV-like virus A/Kansas/14/2017 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The geometric mean titer (GMT) across samples was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  38. Percentage of Participants Achieving a Serum Hemagglutination Inhibition (HAI) Antibody Titer of >= 1:40 Against the H3N2 M2SR-like Virus A/Brisbane/10/2007

    Blood was collected for HAI assays conducted with H3N2 M2SR-like virus A/Brisbane/10/2007 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The percentage of participants with HAI geometric mean titer >= 1:40 was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  39. Percentage of Participants Achieving a Serum Hemagglutination Inhibition (HAI) Antibody Titer of >= 1:40 Against the H3N2 QIV-like Virus A/North Carolina/04/2016

    Blood was collected for HAI assays conducted with H3N2 QIV-like virus A/North Carolina/04/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The percentage of participants with HAI geometric mean titer >= 1:40 was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  40. Percentage of Participants Achieving a Serum Hemagglutination Inhibition (HAI) Antibody Titer of >= 1:40 Against the H3N2 QIV-like Virus A/Singapore/INFIMH-16-0019/2016

    Blood was collected for HAI assays conducted with H3N2 QIV-like virus A/Singapore/INFIMH-16-0019/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The percentage of participants with HAI geometric mean titer >= 1:40 was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  41. Percentage of Participants Achieving a Serum Hemagglutination Inhibition (HAI) Antibody Titer of >= 1:40 Against the H3N2 QIV-like Virus A/Kansas/14/2017

    Blood was collected for HAI assays conducted with H3N2 QIV-like virus A/Kansas/14/2017 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The percentage of participants with HAI geometric mean titer >= 1:40 was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  42. Percentage of Participants Achieving a Serum Neutralizing Antibody Titer of >= 1:40 Against the H3N2 M2SR-like Virus A/Brisbane/10/2007

    Blood was collected for Neutralizing assays conducted with H3N2 M2SR-like virus A/Brisbane/10/2007 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The percentage of participants with HAI geometric mean titer >= 1:40 was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  43. Percentage of Participants Achieving a Serum Neutralizing Antibody Titer of >= 1:40 Against the H3N2 QIV-like Virus A/North Carolina/04/2016

    Blood was collected for Neutralizing assays conducted with H3N2 QIV-like virus A/North Carolina/04/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The percentage of participants with HAI geometric mean titer >= 1:40 was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  44. Percentage of Participants Achieving a Serum Neutralizing Antibody Titer of >= 1:40 Against the H3N2 QIV-like Virus A/Singapore/INFIMH-16-0019/2016

    Blood was collected for Neutralizing assays conducted with H3N2 QIV-like virus A/Singapore/INFIMH-16-0019/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The percentage of participants with HAI geometric mean titer >= 1:40 was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  45. Percentage of Participants Achieving a Serum Neutralizing Antibody Titer of >= 1:40 Against the H3N2 QIV-like Virus A/Kansas/14/2017

    Blood was collected for Neutralizing assays conducted with H3N2 QIV-like virus A/Kansas/14/2017 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. The percentage of participants with HAI geometric mean titer >= 1:40 was calculated within each study arm and analysis time point.

    Measured: Day 1 through Day 113

  46. Percentage of Participants Achieving Hemagglutination Inhibition (HAI) Antibody Seroconversion Against the H3N2 M2SR-like Virus A/Brisbane/10/2007

    Blood was collected for HAI assays conducted with H3N2 M2SR-like virus A/Brisbane/10/2007 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Seroconversion is defined as either a pre-vaccination geometric mean titer (GMT) < 1:10 and a post-vaccination GMT >= 1:40, or a pre-vaccination GMT >= 1:10 and a minimum 4-fold rise in post-vaccination GMT. The percentage of participants achieving seroconversion was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  47. Percentage of Participants Achieving Hemagglutination Inhibition (HAI) Antibody Seroconversion Against the H3N2 QIV-like Virus A/North Carolina/04/2016

    Blood was collected for HAI assays conducted with H3N2 QIV-like virus A/North Carolina/04/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Seroconversion is defined as either a pre-vaccination geometric mean titer (GMT) < 1:10 and a post-vaccination GMT >= 1:40, or a pre-vaccination GMT >= 1:10 and a minimum 4-fold rise in post-vaccination GMT. The percentage of participants achieving seroconversion was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  48. Percentage of Participants Achieving Hemagglutination Inhibition (HAI) Antibody Seroconversion Against the H3N2 QIV-like Virus A/Singapore/INFIMH-16-0019/2016

    Blood was collected for HAI assays conducted with H3N2 QIV-like virus A/Singapore/INFIMH-16-0019/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Seroconversion is defined as either a pre-vaccination geometric mean titer (GMT) < 1:10 and a post-vaccination GMT >= 1:40, or a pre-vaccination GMT >= 1:10 and a minimum 4-fold rise in post-vaccination GMT. The percentage of participants achieving seroconversion was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  49. Percentage of Participants Achieving Hemagglutination Inhibition (HAI) Antibody Seroconversion Against the H3N2 QIV-like Virus A/Kansas/14/2017

    Blood was collected for HAI assays conducted with H3N2 QIV-like virus A/Kansas/14/2017 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Seroconversion is defined as either a pre-vaccination geometric mean titer (GMT) < 1:10 and a post-vaccination GMT >= 1:40, or a pre-vaccination GMT >= 1:10 and a minimum 4-fold rise in post-vaccination GMT. The percentage of participants achieving seroconversion was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  50. Percentage of Participants Achieving Neutralizing Antibody Seroconversion Against the H3N2 M2SR-like Virus A/Brisbane/10/2007

    Blood was collected for Neutralizing assays conducted with H3N2 M2SR-like virus A/Brisbane/10/2007 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Seroconversion is defined as either a pre-vaccination geometric mean titer (GMT) < 1:10 and a post-vaccination GMT >= 1:40, or a pre-vaccination GMT >= 1:10 and a minimum 4-fold rise in post-vaccination GMT. The percentage of participants achieving seroconversion was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  51. Percentage of Participants Achieving Neutralizing Antibody Seroconversion Against the H3N2 QIV-like Virus A/North Carolina/04/2016

    Blood was collected for Neutralizing assays conducted with H3N2 QIV-like virus A/North Carolina/04/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Seroconversion is defined as either a pre-vaccination geometric mean titer (GMT) < 1:10 and a post-vaccination GMT >= 1:40, or a pre-vaccination GMT >= 1:10 and a minimum 4-fold rise in post-vaccination GMT. The percentage of participants achieving seroconversion was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  52. Percentage of Participants Achieving Neutralizing Antibody Seroconversion Against the H3N2 QIV-like Virus A/Singapore/INFIMH-16-0019/2016

    Blood was collected for Neutralizing assays conducted with H3N2 QIV-like virus A/Singapore/INFIMH-16-0019/2016 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Seroconversion is defined as either a pre-vaccination geometric mean titer (GMT) < 1:10 and a post-vaccination GMT >= 1:40, or a pre-vaccination GMT >= 1:10 and a minimum 4-fold rise in post-vaccination GMT. The percentage of participants achieving seroconversion was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

  53. Percentage of Participants Achieving Neutralizing Antibody Seroconversion Against the H3N2 QIV-like Virus A/Kansas/14/2017

    Blood was collected for Neutralizing assays conducted with H3N2 QIV-like virus A/Kansas/14/2017 as the antigen. Collection took place on Day 1 (pre-vaccination), Days 8, 22, and 57 after first vaccination, immediately prior to second vaccination (Day 92), and 21 days after second vaccination (Day 113). The geometric mean of each sample's replicate results was calculated from available results. Seroconversion is defined as either a pre-vaccination geometric mean titer (GMT) < 1:10 and a post-vaccination GMT >= 1:40, or a pre-vaccination GMT >= 1:10 and a minimum 4-fold rise in post-vaccination GMT. The percentage of participants achieving seroconversion was calculated within each study arm and analysis time point.

    Measured: Day 8 through Day 113

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted12 Jun 2018
  2. Study start15 Aug 2018
  3. Primary completion27 Aug 2020
  4. Study completion27 Aug 2020

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1
Primary purpose
Prevention
Allocation
Randomised
Intervention model
Parallel groups
Masking
Double blind
Who is masked
Participant, Investigator
Enrolment
43 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT03553940
Sponsor's protocol ID
17-0012
Other IDs
HHSN272201300021I
Status last verified
1 Mar 2021
First submitted
31 May 2018
Last updated
21 Oct 2021
FDA-regulated drug
Yes
FDA-regulated device
No

Publications

  • Taaffe J, Ostrowsky JT, Mott J, Goldin S, Friede M, Gsell P, Chadwick C. Advancing influenza vaccines: A review of next-generation candidates and their potential for global health impact. Vaccine. 2024 Dec 2;42(26):126408. doi: 10.1016/j.vaccine.2024.126408. Epub 2024 Oct 5.

    PubMed 39369576

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing Influenza Virus Monovalent A/H3N2/Bris 10 M2SR Live Vaccine and Quadrivalent MDCK Inactivated Influenza Vaccine in people with Influenza and Influenza Immunisation, run by National Institute of Allergy and Infectious Diseases (NIAID) at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 18 inclusion and 35 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 21 Oct 2021. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 21 Oct 2021). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Number of Participants With Adverse Events of Special Interest (AESIs) (time frame: Day 1 through Day 92). The study lists 5 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT03553940, which also lists 1 linked publication.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 21 Oct 2021.

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