Safety and Immunogenicity Study of Booster Vaccination With COVID-19 Vaccine (Vero Cell),Inactivated From Different Manufactures for Prevention of COVID-19

Study Overview
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Brief Summary
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This is a randomized, Open, control phase Ⅳ clinical trial of inactivated COVID-19 vaccine manufactured by Sinovac Research & Development Co., Ltd,Beijing institute of Biological Products Co.,Ltd and Wuhan Institute of Biological Products Co.,Ltd.The purpose of this study is to explore booster Immunization of SARS-CoV-2 Inactivated Vaccine from different manufactures in adults aged 18-45 years old Previously Vaccinated with inactivated COVID-19 vaccine

Detailed Description
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This study a randomized, Open, control phase Ⅳclinical trial of inactivated COVID-19 vaccine .The purpose of this study is to explore booster Immunization of SARS-CoV-2 inactivated vaccine from different manufactures in adults aged 18-45 years old previously vaccinated with inactivated COVID-19 vaccine.A total of 480 subjects who have completed vaccination of two doses of inactivated COVID-19 vaccine for 6 to 8 months will be enrolled.In this study ,96 subjects who completed primary immunization with inactivated COVID-19 vaccine manufactured by Sinovac Research & Development Co.,Ltd. will receive one dose of booster immunization with inactivated COVID-19 vaccine manufactured by Sinovac Research & Development Co.,Ltd.(experimental group 1).192 subjects who completed primary immunization with inactivated COVID-19 vaccine manufactured by Beijing institute of Biological Products Co.,Ltd. will be randomly divided into two groups (experimental group 2 and experimental group 3) in a 1:1 ratio and receive one dose of booster immunization with inactivated COVID-19 vaccine manufactured by Sinovac Research & Development Co.,Ltd. and Beijing institute of Biological Products Co., Ltd,respectively.192 subjects who completed primary immunization with inactivated COVID-19 vaccine manufactured by Wuhan Institute of Biological Products Co.,Ltd.will be randomly divided into two groups(experimental group 4 and experimental group 5) in a 1:1 ratio and receive one dose of booster immunization with inactivated COVID-19 vaccine manufactured by Sinovac Research & Development Co.,Ltd. and Wuhan Institute of Biological Products Co.,Ltd.

Official Title
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A Randomized, Open, Control Phase ⅠV Clinical Trial, to Evaluate One Booster Immunization of Inactivated COVID-19 Vaccine (CoronaVac) or Original Vaccine in Adults Aged 18-45 Years Old Previously Vaccinated With Inactivated COVID-19 Vaccine From Difference Manufactures

Conditions
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COVID-19

Intervention / Treatment
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* Biological: Experimental vaccine 1
* Biological: Experimental vaccine 2
* Biological: Experimental vaccine 3


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Adults aged 18-45; Proven legal identity; The subjects can understand and voluntarily sign the informed consent form and be willing to complete the study in accordance with the study plan; Have completed two doses of SARS-CoV-2 inactivated vaccine vaccination for 6 to 8 months(the interval between the two doses vaccine of primary immunization is 21 35 days, and the two doses vaccine of primary immunization should be manufactured by the same manufactures). Exclusion Criteria: History of SARS-CoV-2 infection(laboratory confirmed); Have received inactivated SARS-CoV-2 vaccine from other manufacturers other than Sinovac Life Sciences Co., Ltd.,Beijing Institute of Biological Products Co.,Ltd.and Wuhan Institute of Biological Products Co.,Ltd.and received three and more doses of inactivated SARS-CoV-2 vaccine; Severe adverse reactions, such as urticaria, dyspnea, and angioneurotic edema , occurred during the primary immunization; Autoimmune disease such as systemic lupus erythematosus or immunodeficiency / immunosuppression such as AIDS, post-transplant; Severe chronic diseases, severe cardiovascular diseases, hypertension and diabetes that cannot be controlled by drugs, liver or kidney diseases, malignant tumors, etc; Severe neurological disease (epilepsy, convulsions or convulsions) or mental illness; Diagnosed abnormal blood coagulation function (eg, lack of blood coagulation factors, blood coagulopathy, abnormal platelets) or obvious bruising or blood coagulation; Immunosuppressive therapy, cytotoxic therapy, inhaled corticosteroids(excluding allergic rhinitis corticosteroid spray therapy, acute noncomplicated dermatitis superficial corticosteroid therapy) in the past 6 months; History of alcohol or drug abuse; Receipt of blood products within in the past 3 months; Receipt of other investigational drugs in the past 30 days; Receipt of other investigational drugs in the past 30 days; Receipt of attenuated live vaccines in the past 14 days; Acute diseases or acute exacerbation of chronic diseases within 7 days prior to booster vaccination; Axillary temperature >37.0°C; Already pregnant or are breastfeeding, planning to get pregnant within 1months (according to subjects' self-report and urine pregnancy test results); Participated in other clinical trials prior to enrollment and during the followup period, or planned to participate in other clinical trials during the clinical trial period; According to the investigator's judgment, the subject has any other factors that are not suitable for participating in the clinical trial.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 45 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Experimental Group 1<br>96 subjects who completed primary immunization with inactivated COVID-19 vaccine manufactured by Sinovac Research & Development Co.,Ltd. will receive one dose of booster immunization with inactivated COVID-19 vaccine manufactured by Sinovac Research & Development Co.,Ltd. | Biological: Experimental vaccine 1<br>* Inactivated COVID-19 vaccine manufactured by Sinovac Life Sciences Co., Ltd.600SU inactivated virus in 0.5 mL of aluminium hydroxide solution per injection.<br>|
| Experimental: Experimental Group 2<br>96 subjects who completed primary immunization with inactivated COVID-19 vaccine manufactured by Beijing institute of Biological Products Co,Ltd. will receive one dose of booster immunization with inactivated COVID-19 vaccine manufactured by Sinovac Research & Development Co.,Ltd. | Biological: Experimental vaccine 1<br>* Inactivated COVID-19 vaccine manufactured by Sinovac Life Sciences Co., Ltd.600SU inactivated virus in 0.5 mL of aluminium hydroxide solution per injection.<br>|
| Experimental: Experimental Group 3<br>96 subjects who completed primary immunization with inactivated COVID-19 vaccine manufactured by Beijing institute of Biological Products Co.,Ltd. will receive one dose of booster immunization with inactivated COVID-19 vaccine manufactured by Beijing institute of Biological Products Co.,Ltd. | Biological: Experimental vaccine 2<br>* Inactivated COVID-19 vaccine manufactured by Beijing Institute of Biological Products Co.,Ltd.4ug inactivated virus in 0.5 mL of aluminium hydroxide solution per injection.<br>|
| Experimental: Experimental Group 4<br>92 subjects who completed primary immunization with inactivated COVID-19 vaccine manufactured by Wuhan Institute of Biological Products Co.,Ltd will receive one dose of booster immunization with inactivated COVID-19 vaccine manufactured by Sinovac Research & Development Co.,Ltd. | Biological: Experimental vaccine 1<br>* Inactivated COVID-19 vaccine manufactured by Sinovac Life Sciences Co., Ltd.600SU inactivated virus in 0.5 mL of aluminium hydroxide solution per injection.<br>|
| Experimental: Experimental Group 5<br>92 subjects who completed primary immunization with inactivated COVID-19 vaccine manufactured by Wuhan Institute of Biological Products Co.,Ltd will receive one dose of booster immunization with inactivated COVID-19 vaccine manufactured by Wuhan Institute of Biological Products Co.,Ltd. | Biological: Experimental vaccine 3<br>* Inactivated COVID-19 vaccine manufactured by Wuhan Institute of Biological Products Co.,Ltd.200WU inactivated virus in 0.5 mL of aluminium hydroxide solution per injection.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Immunogenicity index-GMT of neutralizing antibodies | GMT of neutralizing antibody 28 days after booster dose. | 28 days after booster dose | 
| Immunogenicity index-seroconversion rate (4-fold and above increase)of neutralizing antibodies | Seroconversion rate (4-fold and above increase)of neutralizing antibodies 28 days after booster dose. | 28 days after booster dose | 
| Immunogenicity index-seropositive rate of neutralizing antibody | Seropositive rate of neutralizing antibody 28 days after booster dose. | 28 days after booster dose | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Safety index-Incidence of adverse reactions | Incidence of adverse reactions occured 0-28 days after booster | 0-28 days after booster | 
| Safety index-Incidence of adverse reactions | Incidence of adverse reactions occurred 0-7 days after booster dose. | 0-7 days after booster dose | 
| Safety index-Incidence of SAEs and AESIs | Incidence of SAEs and AESIs occured 0-28 days after booster. | 0-28 days after booster |