ZF2001 Booster Immunization Clinical Trials of 6 Months After the Completion of Basic Immunization

To Evaluate the Immunogenicity and Safety of Booster Immunization 6 Months After the Completion of Basic Immunization of Recombinant Novel Coronavirus Vaccine (CHO Cell) in People 18 Years Old and Above

The purpose of this study is to evaluate the immunogenicity and safety of the recombinant novel coronavirus vaccine (CHO cells) after the booster immunization. It is planned to screen 300 subjects of 18 years old and above who have completed the basic immunization of recombinant novel coronavirus vaccine (CHO cells), to evaluate the immunogenicity and safety of the booster immunization of 6 months (window period ± 1 month) after the basic immunization. Investigate the geometric mean titer (GMT), GMI and 4 times growth rate of SARS-CoV-2 neutralizing antibody and RBD protein binding antibody 14 days, 30 days, and 6 months after booster vaccination; the incidence of all AEs within 1 month after the booster vaccination, the incidence of all serious adverse events (SAE) within 6 months after the booster vaccination.

Study Overview

• Status: Completed
• Conditions: Prevention of COVID-19
• Intervention / Treatment: Biological: Recombinant novel coronavirus vaccine (CHO cells)

Detailed Description

This study adopts an open experimental design. It is planned to screen 300 subjects of 18 years old and above who have completed the basic immunization of recombinant novel coronavirus vaccine (CHO cells), to evaluate the immunogenicity and safety of the booster immunization of 6 months (window period ± 1 month) after the basic immunization.

Immunogenicity observation: the geometric mean titer (GMT), GMI and 4 times growth rate of SARS-CoV-2 neutralizing antibody and RBD protein binding antibody 14 days, 30 days, and 6 months after booster vaccination.

Safety observation:

1. All adverse events (AE) were collected within 30 minutes after the booster immunization, all AEs (including both solicited and unsolicited AEs) 0-7 days after the booster immunization, and all AEs (unsolicited AEs) 8-30 days after the booster immunization.

   Solicited AE (the following events occurring within 7 days of vaccination) :

   Adverse events at the inoculation site (local) : pain, pruritus, redness, swelling, rash, induration; Non-inoculated site (systemic) adverse events: fever, headache, fatigue, diarrhea, nausea, vomiting, muscle pain (non-inoculated site), acute allergic reactions, cough.

2. All SAEs were collected within 6 months after the booster immunization.

• Study Type: Interventional
• Enrollment (Actual): 300
• Phase: Phase 2; Phase 1

Contacts and Locations

Study Locations

• China
  • Hunan
    • Changsha, Hunan, China, 410005
      • Hunan Provincial Center for Disease Control and Prevention Preventive Medicine Clinic

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• Subjects of 18 years old and above who has completed basic immunization with recombinant novel coronavirus vaccine (CHO cells) since 6 months (window period ± 1 month);
• The subjects voluntarily participate in the study, sign an informed consent form, and can provide valid identification, understand and comply with the requirements of the trial protocol;
• Female subjects of childbearing age agree to take effective contraceptive measures from the start of the study to 1 month after vaccination.

Exclusion Criteria:

• A confirmed case of novel coronavirus infection or asymptomatic infection or a history of positive novel coronavirus nucleic acid test;
• Patients with uncontrolled lymphoproliferative diseases, unresolved aplastic anemia, active primary immune thrombocytopenia (ITP), uncontrolled coagulopathy, etc;
• Patients with malignant tumors before and after surgery, patients undergoing chemotherapy, radiotherapy, immunotherapy, etc.; patients with organ transplantation status;
• People with uncontrolled epilepsy and other serious neurological diseases (such as transverse myelitis, Guillain-Barre syndrome, demyelinating diseases, etc.);
• Suffering from acute diseases, or acute attacks of chronic diseases, or uncontrolled severe chronic diseases, such as hypertension that cannot be controlled by drugs (systolic blood pressure ≥150mmHg and/or diastolic blood pressure ≥100mmHg);
• Previous history of severe allergies to any vaccine, or history of severe allergies to any component of the test vaccine, including aluminum preparations, such as: anaphylactic shock, allergic laryngeal edema, allergic purpura, thrombocytopenic purpura, dyspnea, vascular nerve Sexual edema, etc;
• Women who are breastfeeding or pregnant;
• In addition to completing the recombinant novel coronavirus vaccine (CHO cell) within the past 7 months, has participated or is participating in other COVID-19 related clinical trials;
• Investigators believe that any disease or condition may put the subject at an unacceptable risk; the subject cannot meet the requirements of the protocol; the situation that interferes with the assessment of the vaccine response.

Study Plan

How is the study designed?

Design Details

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

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Investigational vaccine group; Recombinant novel coronavirus vaccine (CHO cells) injection, Intramuscular injection of deltoid muscle of upper arm of 25μg/0.5ml/person dose.	Biological: Recombinant novel coronavirus vaccine (CHO cells); At 6 months after the basic immunization (window period ± 1 month), 1 dose of recombinant novel coronavirus vaccine (CHO cells) is vaccinated.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Immunogenicity endpoint	Geometric mean titer (GMT) of SARS-CoV-2 neutralizing antibody and RBD protein binding antibody	14 days after booster vaccination
Immunogenicity endpoint	Geometric mean titer (GMT) of SARS-CoV-2 neutralizing antibody and RBD protein binding antibody	30 days after booster vaccination
Immunogenicity endpoint	Geometric mean titer (GMT) of SARS-CoV-2 neutralizing antibody and RBD protein binding antibody	6 months after booster vaccination

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Immunogenicity endpoint	GMI and 4 times growth rate of SARS-CoV-2 neutralizing antibody and RBD protein binding antibody	14 days, 30 days, and 6 months after booster vaccination
Safety endpoint	Incidence of all AEs	Within 1 month after booster vaccination
Safety endpoint	Incidence of all SAEs	Within 6 months after booster vaccination

Collaborators and Investigators

• Sponsor: Anhui Zhifei Longcom Biologic Pharmacy Co., Ltd.
• Investigators: Principal Investigator: Tao Huang, Bachelor, Hunan Provincial Center for Disease Control and Prevention

Study record dates

Study Major Dates

• Study Start (Actual): January 10, 2022
• Primary Completion (Actual): August 31, 2022
• Study Completion (Actual): December 6, 2022

Study Registration Dates

• First Submitted: January 4, 2022
• First Submitted That Met QC Criteria: January 16, 2022
• First Posted (Actual): January 20, 2022

Study Record Updates

• Last Update Posted (Actual): June 15, 2023
• Last Update Submitted That Met QC Criteria: June 13, 2023
• Last Verified: June 1, 2023

More Information

Terms related to this study

• Other Study ID Numbers: LKM-2021-NCV-JQ01

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No