Safety and Immunogenicity Study of Booster Vaccination With Medium-dosage or High-dosage SARS-CoV-2 Inactivated Vaccine for Prevention of COVID-19

February 13, 2022 updated by: Sinovac Biotech Co., Ltd

A Randomized, Double-Blinded Clinical Trial to Evaluate Additional Dose of Medium-dosage or High-dosage SARS-CoV-2 Inactivated Vaccine in Healthy Individuals Previously Vaccinated With CoronaVac

This is a randomized, double-blinded, phase ⅠV clinical trial of SARS-CoV-2 inactivated vaccine manufactured by manufactured by Sinovac Research & Development Co., Ltd. The purpose of this study is to evaluate the safety and immunogenicity of booster vaccination with high-dosage SARS-CoV-2 vaccine in populations who have received two-dose Coronavac with 2nd dose vaccinated more than 6 month.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Active, not recruiting

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

This study a randomized, double-blinded, phase ⅠV clinical trial of SARS-CoV-2 inactivated vaccine .The purpose of this study is to evaluate the safety and immunogenicity of booster vaccination with high-dosage SARS-CoV-2 vaccine in populations who have received two-dose Coronavac with 2nd dose vaccinated more than 6 month.A total of 1200 subjects who have received two-dose Coronavac with 2nd dose vaccinated more than 6 month will be enrolled.All of subjects will be randomly divided into two groups in a 1:1 ratio .Subjects in experimental group will receive high-dosage SARS-CoV-2 inactivated vaccine.Subjects in control group will receive medium-dosage SARS-CoV-2 inactivated vaccine .

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 (Anticipated)

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.
1200

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
      • Xinqi, Jiangsu, China, 221400
        • Xinqi City 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

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Adults aged 18-59;
  • 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 received two doses of inactivated SARS-CoV-2 vaccine(CoronaVac) manufactured by Sinovac Research & Development Co., Ltd at an interval of 21 to 35 days and is currently 6-8 months (180 to 240 days) after the second dose.

Exclusion Criteria:

  • History of SARS-CoV-2 infection(laboratory confirmed);
  • Have 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 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 follow-up 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.

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: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

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: Experimental Group
600 participants will receive one dose of booster vaccination with high-dosage inactivated SARS-CoV-2 vaccine .
Biological: High-dosage SARS-CoV-2 vaccine
SARS-CoV-2 Inactivated Vaccine 1200SU inactivated virus in 0.5 mL of aluminium hydroxide solution per injection
Other Names:
  • CoronaVac
Active Comparator: Control Group
600 participants will receive one dose of booster vaccination with medium-dosage inactivated SARS-CoV-2 vaccine .
Biological: Medium-dosage SARS-CoV-2 vaccine
SARS-CoV-2 Inactivated Vaccine 600SU inactivated virus in 0.5 mL of aluminium hydroxide solution per injection
Other Names:
  • CoronaVac

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
Immunogenicity index-GMT of neutralizing antibodies（CZ02 strain）
Time Frame: Day 28 after booster vaccination
GMT of neutralizing antibodies（CZ02 strain） 28 days after booster vaccination.
Day 28 after booster 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
Immunogenicity index-seropositive rate of neutralizing antibodies（CZ02 strain）
Time Frame: Day 28 after booster vaccination
The seropositive rate of neutralizing antibodies（CZ02 strain） 28 days after booster vaccination
Day 28 after booster vaccination
Immunogenicity index-seroconversion rate of neutralizing antibodies（CZ02 strain）
Time Frame: Day 28 after booster vaccination
The seroconversion rate of neutralizing antibodies（CZ02 strain） 28 days after booster vaccination
Day 28 after booster vaccination
Immunogenicity index-GMI of neutralizing antibodies（CZ02 strain）
Time Frame: Day 28 after booster vaccination
GMI of neutralizing antibodies（CZ02 strain） 28 days after booster vaccination
Day 28 after booster vaccination
Immunogenicity index-seropositive rate of neutralizing antibodies（Delta Strain）
Time Frame: Day 28 after booster vaccination
The seropositive rate of neutralizing antibodies（Delta Strain） 28 days after booster vaccination
Day 28 after booster vaccination
Immunogenicity index-seroconversion rate of neutralizing antibodies（Delta Strain）
Time Frame: Day 28 after booster vaccination
The seroconversion rate of neutralizing antibodies（Delta Strain） 28 days after booster vaccination
Day 28 after booster vaccination
Immunogenicity index-GMI of neutralizing antibodies（Delta Strain）
Time Frame: Day 28 after booster vaccination
GMI of neutralizing antibodies（Delta Strain） 28 days after booster vaccination
Day 28 after booster vaccination
Immunogenicity index-seroconversion rate of neutralizing antibodies（Omicron Strain）
Time Frame: Day 28 after booster vaccination
The seroconversion rate of neutralizing antibodies（Omicron Strain） 28 days after booster vaccination
Day 28 after booster vaccination
Immunogenicity index-seropositive rate of neutralizing antibodies（Omicron Strain）
Time Frame: Day 28 after booster vaccination
The seropositive rate of neutralizing antibodies（Omicron Strain） 28 days after booster vaccination
Day 28 after booster vaccination
Immunogenicity index-GMI of neutralizing antibodies（Omicron Strain）
Time Frame: Day 28 after booster vaccination
GMI of neutralizing antibodies（Omicron Strain） 28 days after booster vaccination
Day 28 after booster vaccination
Immunogenicity index-GMT of neutralizing antibodies（Omicron Strain）
Time Frame: Day 28 after booster vaccination
GMT of neutralizing antibodies（Omicron Strain） 28 days after booster vaccination
Day 28 after booster vaccination
Immunogenicity index-GMT of neutralizing antibodies（Delta Strain）
Time Frame: Day 28 after booster vaccination
GMT of neutralizing antibodies（Delta Strain） 28 days after booster vaccination
Day 28 after booster 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
Immunogenicity index-the seropositive rate of neutralizing antibodies（CZ02 strain,Delta Strain and Omicron Strain）
Time Frame: 6 months after the booster vaccination
The seroconversion rate of neutralizing antibodies（CZ02 strain,Delta Strain and Omicron Strain） 6 months after the booster vaccination
6 months after the booster vaccination
Immunogenicity index-GMT of neutralizing antibodies（CZ02 strain,Delta Strain and Omicron Strain）
Time Frame: 6 months after the booster vaccination
GMI of neutralizing antibodies（CZ02 strain,Delta Strain and Omicron Strain） 6 months after the booster vaccination
6 months after the booster vaccination

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.
Sinovac Biotech Co., Ltd

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Hongxing Pan, Master, Jiangsu Provincial Center for Disease Prevention and Control

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.
December 17, 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 21, 2021

Study Completion (Anticipated)

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.
June 1, 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).
October 14, 2021

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.
October 14, 2021

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.
October 15, 2021

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.
March 2, 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.
February 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.
October 1, 2021

More Information

Terms related to this study

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.
  • PRO-nCOV-4007

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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