A Clinical Trial of an Inactivated Quadrivalent Influenza Vaccine in Chinese Children Aged 3 to 8 Years

August 13, 2022 updated by: Jiangsu Province Centers for Disease Control and Prevention

A Clinical Trial to Assess Immunogencity and Safety of 2 Doses of anInactivated Quadrivalent Influenza Vaccine in Chinese Children Aged 3 to 8Years

Routine annual influenza vaccination is recommended for all persons aged≥6 months who do not have contraindications. For those aged 6 monthsthrough 8 years who have previously received ≥2 total doses of trivalent orquadrivalent influenza vaccine ≥4 weeks apart, they require only 1 dose ofinfluenza vaccine. For those who have not previously received ≥2 doses oftrivalent or quadrivalent influenza vaccine, they require 2 dose of influenzavaccine. but the evidence on how to select vaccine doses for quadrivalentinfluenza vaccine is limited in China. The study is a prospective, open-labelcomparison of the immunogenicity and reactogenicity of 1 versus 2 doses ofan inactivated quadrivalent influenza vaccine in subjects of 3-8 years old withdifferent history of influenza vaccination.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

Subjects receive 2 dosed of quadrivalent influenza vaccine 4 weeks apart.Blood samples were obtained from children at 3 time points-before receiptof dose 1, 4 weeks after receipt of dose 1 and before dose 2, and 4 weeksafter dose 2. Hemagglutination inhibition (HAI) antibody titers to the A/H3N2,A/H1N1, and B antigens included in the vaccine were measured at each timepoint

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
252

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • China
    • Jiangsu
      • Lianyungang, Jiangsu, China, 222300
        • Donghai County Center for Disease Control and Prevention

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

3 years to 8 years (Child)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Aged 3-8 years old
  • Healthy subjects judged from medical history and clinical examination
  • Subjects themselves or their guardians able to understand and sign theinformed consent
  • Subjects themselves or their guardians can and will comply with therequirements of the protocol
  • Subjects have received ≥2 doses of trivalent or quadrivalent infuenzavaccine before enrollment (Doses need not have been received duringsame or consecutive seasons); Subjects have not received infuenzavaccine before enrollment
  • Subjects with temperature <=37.0°C on axillary setting

Exclusion Criteria:

  • Any prior administration of other research medicine/vaccine in last 30 days
  • Any prior administration of influenza vaccine in last 6 month
  • Any prior administration of immunodepressant or corticosteroids in last 3 months
  • Any prior administration of blood products in last 3 months
  • Any prior administration of any attenuated live vaccine in last 14 days
  • Any prior administration of subunit or inactivated vaccines in last 7 days
  • Subject who developed guillain-Barre syndrome post influenza vaccination
  • Subject who is allergic to any ingredient of the vaccine
  • Subject with acute febrile illness or infectious disease
  • Thrombocytopenia, blood coagulation disorder or bleeding difficulties withintramuscular injection
  • Subject with damaged or low immune function which has already beenknown
  • Subject with congenital heart disease or other birth defects unsuitable for vaccination.
  • Subject with respiratory diseases (including pneumonia, tuberculosis, severe asthma, etc.), heart, liver and kidney diseases, mental disorders, or chronic infections.
  • Any medical, psychological, social or other condition judged byinvestigator, that may interfere subject's compliance with the protocol

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Quadrivalent influenza vaccine
Subjects received 2 doses of 0.5 mL of quadrivalentinfluenza vaccine, 4 weeks apart. Each 0.5-ml dosecontained 15 μg of hemagglutinin per strain.
Biological: Quadrivalent influenza vaccine
Subjects receive two doses of quadrivalent influenzavaccine administered 4 weeks apart by intramuscularinjection. Each 0.5-ml dosecontained 15 μg of hemagglutinin per strain.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
the 95% confidence interval (CI) lower limit for Seroconversion Rate (SCR) of Hemagglutination inhibition (HAI)antibodies against each virus strain after 2nd vaccination ≥40%
Time Frame: day 28 after dose 2
The lowest dilution used in the assay is 1/10. Seroconversion was defined as either a pre-vaccination HAI titer < 1:10and a post-vaccination titer ≥1:40 or a pre-vaccination titer ≥1:10 and ≥ four-fold increase in post-vaccination titer.
day 28 after dose 2
Number of participants with Adverse Reactions (ARs)
Time Frame: 28 days after each vaccination
Frequency and severity of ARs for 28 days after each vaccination
28 days after each vaccination

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
the 95% CI lower limit for seroprotection rates of HAI antibodies against each virus strain after 2nd vaccination≥70%
Time Frame: day 28 after dose 2
A seroprotected subject is defined as a vaccinated subject with serum HAI titer≥ 1:40.
day 28 after dose 2
Geometric Mean Fold Increase (GMFI) of HAI titer against each virus strain after 2nd vaccination>2.5
Time Frame: day 28 after dose 2
Hemagglutination inhibition (HAI) titers were used to calculate post-vaccination geometric mean fold increase (GMFI)against each virus strain
day 28 after dose 2
Number of participants with Adverse Events (AEs)
Time Frame: 28 days after each vaccination
Frequency and severity of AEs for 28 days after each vaccination
28 days after each vaccination
Number of participants with Serious Adverse Events (SAE)
Time Frame: 6 months after the last vaccination
Frequency of SAEs for 6 months after the last vaccination
6 months after the last vaccination

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Comparision between Seroconversion Rate (SCR) of HAI antibodies against each virus strain post dose 1 and dose 2
Time Frame: day 28 after receipt of dose 1 and before dose 2, and day 28 after dose 2
The lowest dilution used in the assay is 1/10. Seroconversion was defined as either a pre-vaccination HAI titer < 1:10and a post-vaccination titer ≥1:40 or a pre-vaccination titer ≥1:10 and ≥ four-fold increase in post-vaccination titer.
day 28 after receipt of dose 1 and before dose 2, and day 28 after dose 2
Comparision between Geometric Mean Titre (GMT) of HAI antibodies against each virus strain post dose 1 and dose 2
Time Frame: day 28 after receipt of dose 1 and before dose 2, and day 28 after dose 2
day 28 after receipt of dose 1 and before dose 2, and day 28 after dose 2
Comparision between seroprotection rates of HAI antibodies against each virus strain post dose 1 and dose 2
Time Frame: day 28 after receipt of dose 1 and before dose 2, and day 28 after dose 2
A seroprotected subject is defined as a vaccinated subject with serum HAI titer≥ 1:40.
day 28 after receipt of dose 1 and before dose 2, and day 28 after dose 2
Comparision between Geometric Mean Fold Increase (GMFI) of HAI antibodies against each virus strain post dose 1and dose 2
Time Frame: day 28 after receipt of dose 1 and before dose 2, and day 28 after dose 2
day 28 after receipt of dose 1 and before dose 2, and day 28 after dose 2

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Jiangsu Province Centers for Disease Control and Prevention

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
September 11, 2021

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 25, 2021

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
May 30, 2022

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
March 29, 2022

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 29, 2022

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
April 6, 2022

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
August 17, 2022

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 13, 2022

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
March 1, 2022

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • SJLGYM-2021-Ⅳ-01

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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