Efficacy, Safety and Immunogenicity Study of the Recombinant Two-component COVID-19 Vaccine (CHO Cell)(Recov)

NCT ID: NCT05398848

Last Updated: 2024-02-29

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE3
• Total Enrollment: 7623 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2022-10-31
• Study Completion Date: 2023-12-29

Brief Summary

This is a multicenter designed Phase III clinical trial. About 10000 participants plan to be enrolled.The objectives of this study are to evaluate the efficacy, safety and immunogenicity of the recombinant two-component COVID-19 vaccine (CHO cell) in adults

Detailed Description

This study is a multicenter, randomized, double-blinded, placebo-controlled Phase III clinical trial. The objectives are to evaluate the efficacy, safety, and immunogenicity of ReCOV in adults aged 18 years and older who have not received any COVID-19 vaccination, and have no history of known COVID-19 in previous 6 months. Three-dose intramuscular (IM) vaccination schedule (21 days interval) will be applied.

About 10000 participants (about 15% participants ≥ 60 years old) with SARS-CoV-2 antibody (IgM and IgG) negative at baseline, will be randomized in a ratio of 1:1 to receive ReCOV (20 μg) or placebo on Day 0, Day 21, and Day 42, respectively. Participants will be stratified by age (18-59 years, ≥ 60 years) and study sites (if applicable).

For efficacy visits, study staff will contact participants on a weekly basis to remind reporting any signs or symptoms of COVID-19. If participants report any signs or symptoms that may be related to COVID-19, they will be required to immediately conduct an unscheduled visit under the instruction by site staff for COVID-19 related assessment and receiving treatment as deemed appropriate.

For reactogenicity and safety visits, all vaccinated participants will be observed for 30 minutes after each dose vaccination at study site for solicited or unsolicited AEs, and will be given subject diary to record solicited AEs within 7 days after each vaccination, and unsolicited AEs from the 1st vaccination to 28 days after the 3rd vaccination.

Approximately 600 participants will be included in the immunogenicity subgroup. Except for the efficacy and safety follow-up visits described above, this subgroup will be collected blood sample on Day 0 (pre-vaccination) and 14 days (+3 days), 90 days (±15 days) and 6 months (±15 days) after the 3rd dose.

Conditions

COVID-19

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: PREVENTION
• Blinding Strategy: QUADRUPLE

Study Groups

Recombinant two-component COVID-19 vaccine (CHO cell)

Antigen: NTD-RBD-foldon protein, Adjuvant (BFA03)

Group Type: EXPERIMENTAL

Recombinant two-component COVID-19 vaccine (CHO cell)

Intervention Type: BIOLOGICAL

Before reconstitution: Lyophilized powder for reconstitution in single-use vials After reconstitution with BFA03 adjuvant: Milk-white solution with no visible foreign matter

Placebo

Adjuvant (BFA03)

Group Type: PLACEBO_COMPARATOR

Placebo

Intervention Type: BIOLOGICAL

Before reconstitution:

Lyophilized powder for reconstitution in single-use vials

After reconstitution with BFA03 adjuvant:

Milk-white solution with no visible foreign matter

Interventions

Recombinant two-component COVID-19 vaccine (CHO cell)

Before reconstitution: Lyophilized powder for reconstitution in single-use vials After reconstitution with BFA03 adjuvant: Milk-white solution with no visible foreign matter

Intervention Type: BIOLOGICAL

Placebo

Before reconstitution:

Lyophilized powder for reconstitution in single-use vials

After reconstitution with BFA03 adjuvant:

Milk-white solution with no visible foreign matter

Intervention Type: BIOLOGICAL

Eligibility Criteria

Inclusion Criteria

1. Aged 18 years and older.

2. Able and willing to comply with all study requirements.

3. Willing to allow investigators to discuss the medical history with his/her general practitioner/personal doctors and access all medical records which are relevant to study procedures.

Exclusion Criteria

5. For females of childbearing potential only, willing to practice continuous effective contraception until 90 days after the final dose vaccination, and have negative pregnancy tests before each dose vaccination.

• Nonchildbearing potential is defined as surgically sterile (history of bilateral tubal ligation, bilateral oophorectomy, hysterectomy) or postmenopausal. A follicle-stimulating hormone (FSH) level and the amenorrhea duration (e.g. amenorrhea for ≥ 12 consecutive months prior to screening without an alternative medical cause) may be measured at the discretion of investigator to confirm postmenopausal status.
• The effective contraceptive methods include sexual abstinence or adequate contraceptive measures such as intrauterine or implanted contraceptive device, oral contraceptives, injected or implanted contraceptives, sustained-release topical contraceptives, condoms (male), diaphragm, and cervical cap, etc.

6. Males participating in this study who are involved in heterosexual sexual activity must agree to practice adequate contraception (as described above) and refrain from donating sperm until 90 days after receiving the final dose vaccination.

7. Agreement to refrain from blood donation during the study.

8. Provide written informed consent form (ICF) prior to study enrollment.

1. Laboratory confirmed SARS-CoV-2 infection defined by RT-PCR assay at screening. Participants with negative result for rapid antigen testing can be enrolled before having the result of RT-PCR assay, however, the participant needs to be withdrawn the following vaccination if the RT-PCR result shows positive.

2. SARS-CoV-2 antibodies (IgM or IgG) positive at screening.

3. Medical history of severe acute respiratory syndrome (SARS), middle east respiratory syndrome (MERS) and COVID-19 within 6 months prior to the randomization.

4. Fever (oral temperature ≥ 37.5°C / axillary temperature ≥ 37.3°C) on the day of vaccination or within recent 72 hours.

5. History of severe allergic disease or reactions likely to be exacerbated by any component of ReCOV, such as allergic shock, allergic laryngeal edema, allergic purpura, thrombocytopaenic purpura, local hypersensitive necrosis reaction (Arthus reaction), or prior history of serious adverse reaction to any vaccine or drug, such as allergy, urticaria eczema, dyspnea, and angioneurotic edema.

6. Have malignant tumor (except for skin basal cell carcinoma or carcinoma uterine cervix in situ) and immune disease (e.g., documented human immunodeficiency virus [HIV] infection, systemic lupus erythematosus, rheumatoid arthritis, asplenia or splenectomy, and other immune disease that may influence immune response at investigator's discretion).

7. Have other severe and/or uncontrolled conditions, including but not limited to, acute infectious disease, cardiovascular disease, respiratory disease, gastrointestinal disease, liver disease, renal disease, hematology disease, endocrine disorder, psychiatric condition and neurological illness. Uncontrolled condition is defined as significant change in therapy or hospitalization for worsening disease during the 3 months before enrollment.

8. Have bleeding disorder (e.g. factor deficiency, coagulopathy or platelet disorder), or prior history of significant bleeding or bruising following intramuscular injections or venipuncture.

9. Received immunosuppressant or other immunomodulators, antiallergic therapy, or cytotoxicity therapy for 14 or more consecutive days within 6 months before receiving the investigational product (IP). Local administration of immunosuppressant or immunomodulator is allowed (e.g., ointment, eye drops, inhalation, or nasal spray). Drugs for local administration should not be given at a dose over the recommended level in package insert or participants should have no signs of systemic exposure.

10. Administration of immunoglobulin and/or blood product within 3 months before using the IP or plan to use that during the study.

11. Continuous use of anticoagulants, such as coumarins and related anticoagulants (i.e., warfarin) or novel oral anticoagulants (i.e., apixaban, rivaroxaban, dabigatran and edoxaban).

12. Used other investigational drug or interventional device within 1 month before using the IP or plan to use that during the study, or are using other investigational drug or are within 5 half-lives after the last dose of the investigational drug.

13. Used subunit or inactivated vaccine within 14 days before using the IP, or used attenuated live or mRNA vaccine within 1 months (30 days) before using the IP, or plan to receive any other vaccines (except for the seasonal influenza vaccine, or emergency use authorized vaccines) during the study.

14. Prior receipt of an investigational or licensed COVID-19 vaccine, or investigational or approved vaccine against a coronavirus, including but not limited to SARS-CoV-1 and MERS-CoV.

15. Suspected or known current alcohol or drug dependency.

16. Pregnancy, lactation or willingness/intention to become pregnant within 90 days after receiving the last dose of study vaccine.

17. Staff of study site, the sponsor, and contract research organization (CRO) taking part in study conduct.

18. Any other significant disease, disorder or finding which may significantly increase the risk to the volunteer because of participation in the study, affect the ability of the volunteer to participate in the study or impair interpretation of the study data at investigator's discretion.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 80 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Jiangsu Rec-Biotechnology Co., Ltd.

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

B.P. Koirala Institute of Health Sciences

Dharān, , Nepal

Aramil City Hospital

Aramil, , Russia

LLC Medical Service solutions

Izhevsk, , Russia

'Federal State Budgetary Scientific Institution "Russian Scientific Centre of Surgery named after academician B.V. Petrovsky"

Moscow, , Russia

'Joint Stock Company "Clinical and diagnostic center "Euromedservice"

Moscow, , Russia

State Regional Budgetary Institution of Healthcare "Murmansk Regional Clinical Hospital named after P.A. Bayandin"

Murmansk, , Russia

LLC Professorskaya klinika

Perm, , Russia

UZI 4D Clinic LLC

Pyatigorsk, , Russia

Klinika Zvyezdnaya LLC

Saint Petersburg, , Russia

Limited Liability Company "Sfera-Med"

Saint Petersburg, , Russia

Research Center Eco-safety

Saint Petersburg, , Russia

Countries

Nepal; Russia

Other Identifiers

REC611C303

Identifier Type: -

Identifier Source: org_study_id