Clinical Trial to Evaluate the Safety and Immunogenicity of Quadrivalent Influenza Vaccine (7.5μg/0.25ml)
Study Details
Study Description
Brief Summary
The purpose of this study is to evaluate the safety and immunogenicity of quadrivalent influenza vaccine in healthy children aged 6-35 months.
Condition or Disease | Intervention/Treatment | Phase |
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Phase 3 |
Detailed Description
The study includes open-labelled phase I and randomized, double-blind, controlled phase III clinical trial. In the phase I, 20 healthy Chinese children aged 6-35 months were administered with two doses of QIV (7.5μg/0.25ml). In the phase Ⅲ clinical trial, 2320 children were assigned to QIV group, TIV (B/Victoria) group and TIV (B/Yamagata) group in a 2:1:1 ratio. All vaccines were manufactured by Sinovac Biotech Co., Ltd.
Study Design
Arms and Interventions
Arm | Intervention/Treatment |
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Experimental: Experimental group-phase Ⅰ Quadrivalent influenza vaccine |
Biological: Quadrivalent influenza vaccine
One dose of quadrivalent influenza vaccine: 0.25 ml per dose containing 7.5μg antigen.
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Experimental: Experimental group-phase Ⅲ Quadrivalent influenza vaccine |
Biological: Quadrivalent influenza vaccine
One dose of quadrivalent influenza vaccine: 0.25 ml per dose containing 7.5μg antigen.
|
Active Comparator: Control group 1-phase Ⅲ Trivalent influenza vaccine (contains B/Victoria strain) |
Biological: Trivalent influenza vaccine (contains B/Victoria strain)
One dose of trivalent influenza vaccine (contains B/Victoria strain): 0.25 ml per dose containing 7.5μg antigen.
|
Active Comparator: Control group 2-phase Ⅲ Trivalent influenza vaccine (contains B/Yamagata strain) |
Biological: Trivalent influenza vaccine (contains B/Yamagata strain)
One dose of trivalent influenza vaccine (contains B/Yamagata strain): 0.25 ml per dose containing 7.5μg antigen.
|
Outcome Measures
Primary Outcome Measures
- The lower limit of 95% confidence intervals (95%CI) of geometric mean titer (GMT) ratio (experimental group/control group) of hemagglutination inhibition (HI) antibody titer≥2/3. [28 days after two doses immunization]
Immunogenicity index, One of the standard to evaluate the experimental vaccine is non-inferior to the control vaccines.
- The lower limit of 95% CI of the seroconversion rate difference (experimental group-control group)≥-10%. [28 days after two doses immunization]
Immunogenicity index, Another standard to evaluate the experimental vaccine is non-inferior to the control vaccines.
Secondary Outcome Measures
- The lower limit of 95%CI of the ratio of GMT (experimental group/control group) >1.5. [28 days after two doses immunization]
Immunogenicity index, One of the standard to evaluate the experimental vaccine is superior to the control vaccines for specific antigen type.
- The lower limit of 95% CI of the difference of HI antibody seroconversion rate (experimental group-control group)>10% [28 days after two doses immunization]
Immunogenicity index, Another standard to evaluate the experimental vaccine is superior to the control vaccines for specific antigen type.
- The lower limit of 95% CI of seroconversion rate for each HI antibody after two doses immunization≥40%. [28 days after two doses immunization]
Immunogenicity index
- The seroprotective rate (HI antibody titer≥1:40) of each HI antibody after two doses immunization≥70%. [28 days after two doses immunization]
Immunogenicity index
- The geometric mean increase (GMI) of each HI antibody after two doses immunization >2.5. [28 days after two doses immunization]
Immunogenicity index
- The lower limit of 95%CI of the ratio of GMT(experimental group/control group)≥2/3, in the subjects whose pre-immune HI antibody titer<1:40 [28 days after two doses immunization]
Immunogenicity index
- The lower limit of 95% CI of the difference of HI antibody seroconversion rate (experimental group-control group)≥-10%, in the subjects whose pre-immune HI antibody titer<1:40. [28 days after two doses immunization]
Immunogenicity index
- The incidence of the solicited local and general adverse reactions 0-7 days after each immunization. [0-7 days]
Safety index, The adverse reactions refers to the adverse events which were considered related to the vaccination.
- The incidence of the unsolicited adverse events 0-28 days after each immunization [0-28 days after each dose immunization]
Safety Index
- The incidence of the serious adverse events within 7 months after the first immunization. [Within 7 months after the first dose immunization]
Safety Index
Eligibility Criteria
Criteria
Inclusion Criteria:
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Healthy volunteer between 6 - 35 months old; Term birth; Birth weight >2500g;
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Proven legal identity;
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Written consent of the guardian(s) of the volunteer;
Exclusion Criteria:
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Received seasonal influenza vaccine in the current year;
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Suffering from seasonal influenza in the past 6 moths;
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Axillaty temperature > 37.0 °C;
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History of allergy to any vaccine or vaccine ingredient;
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History of serious adverse reaction(s) to vaccination, such as urticaria, difficulty in breathing, angioneurotic edema, abdominal pain, etc;
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Autoimmune disease or immunodeficiency;
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Congenital malformation, developmental disorders;
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Severe malnutrition;
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Diagnosed coagulation function abnormal (e.g., coagulation factor deficiency, coagulation disorder, or platelet abnormalities) , or obvious bruising or coagulation disorders;
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History of epilepsy (except febrile seizures occurred < 2 years of age or pure epilepsy occurred within the past 3 years that does not need treatment)
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Chronic diseases (e.g., viral hepatitis, tuberculosis, diabetes, blood diseases, or neurological disorders)
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Acute disease or acute stage of chronic disease;
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Receipt of any of the following products:
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Any subunit vaccine or inactivated vaccine (e.g., pneumococcal vaccine) or treatment of allergy within 14 days prior to study entry;
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Any live attenuated vaccine within 30 days prior to study entry;
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Any other investigational medicine(s) or vaccine within 30 days prior to study entry;
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Blood product within 3 months prior to study entry;
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Any immunosuppressant, cytotoxic medicine, or inhaled corticosteroids (except corticosteroid spray for treatment of allergic rhinitis or corticosteroid treatment on surface for acute non-complicated dermatitis) within 6 month prior to study entry;
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Participate or will participate in other clinical trial(s) during this study;
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Based on the judgment of investigator(s) or the Ethic Committee, there was any condition indicating that the subject should be excluded;
Contacts and Locations
Locations
Site | City | State | Country | Postal Code | |
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1 | Guanyun Center for Disease Prevention and Control | Lianyungang | Jiangsu | China | 222200 |
2 | Pizhou Center for Disease Prevention and Control | Pizhou | Jiangsu | China | 221300 |
Sponsors and Collaborators
- Sinovac Biotech Co., Ltd
Investigators
- Principal Investigator: Yuemei Hu, Bachelor, Jiangsu Provincial Center for Disease Prevention and Control
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- PRO-QINF-3002