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COVID-19Phase 3NCT05398848

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

A Phase 3 study testing Recombinant two-component COVID-19 vaccine (CHO cell) in people with COVID-19, run by Jiangsu Rec-Biotechnology Co., Ltd. at 11 sites in 2 countries.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial 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 Read more about this study

Who is it for?
Ages 18 to 80 yearsHealthy volunteers can take part
Conditions the study is for
COVID-19
What is being tested?
Recombinant two-component COVID-19 vaccine (CHO cell)
Type of treatment
Vaccines
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
7,623 participants
Where
11 sitesin 2 countries
Study dates
31 Oct 2022to 29 Dec 2023
Phase
Phase 3
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 80 years
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Who may be able to join

  • Aged 18 years and older.
  • Able and willing to comply with all study requirements.
  • 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.
  • Healthy adults, or adults with stable medical condition who have a pre-existing medical condition that does not meet any exclusion criteria. A stable medical condition is defined as disease not requiring significant change in therapy or hospitalization for worsening disease during the 3 months before enrollment.
  • 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.
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  • 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.
  • 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.
  • Agreement to refrain from blood donation during the study.
  • Provide written informed consent form (ICF) prior to study enrollment.

Who cannot join

  • 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.
  • SARS-CoV-2 antibodies (IgM or IgG) positive at screening.
  • Medical history of severe acute respiratory syndrome (SARS), middle east respiratory syndrome (MERS) and COVID-19 within 6 months prior to the randomization.
  • Fever (oral temperature ≥ 37.5°C / axillary temperature ≥ 37.3°C) on the day of vaccination or within recent 72 hours.
  • 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.
  • 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).
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  • 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.
  • Have bleeding disorder (e.g. factor deficiency, coagulopathy or platelet disorder), or prior history of significant bleeding or bruising following intramuscular injections or venipuncture.
  • 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.
  • Administration of immunoglobulin and/or blood product within 3 months before using the IP or plan to use that during the study.
  • Continuous use of anticoagulants, such as coumarins and related anticoagulants (i.e., warfarin) or novel oral anticoagulants (i.e., apixaban, rivaroxaban, dabigatran and edoxaban).
  • 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.
  • 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.
  • 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.
  • Suspected or known current alcohol or drug dependency.
  • Pregnancy, lactation or willingness/intention to become pregnant within 90 days after receiving the last dose of study vaccine.
  • Staff of study site, the sponsor, and contract research organization (CRO) taking part in study conduct.
  • 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.

Trial locations and contacts

11 sites in 2 countries.

11 sites in 2 countries

Russia10 sites
  • Aramil City Hospital

    Aramil

  • LLC Medical Service solutions

    Izhevsk

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

    Moscow

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

    Moscow

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

    Murmansk

  • LLC Professorskaya klinika

    Perm

  • UZI 4D Clinic LLC

    Pyatigorsk

  • Klinika Zvyezdnaya LLC

    Saint Petersburg

  • Limited Liability Company "Sfera-Med"

    Saint Petersburg

  • Research Center Eco-safety

    Saint Petersburg

Other trials in Russia

Nepal1 site
  • B.P. Koirala Institute of Health Sciences

    Dharān

Other trials in Nepal

About this study

Official title: A Multicenter, Randomized, Double-blinded, Placebo-controlled Phase III Trial to Evaluate the Efficacy, Safety and Immunogenicity of the Recombinant Two-component COVID-19 Vaccine (CHO Cell) in Adults Aged 18 Years and Older

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

Read the 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
Being tested
Recombinant two-component COVID-19 vaccine (CHO cell), Placebo
Medical subject headings
COVID-19

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

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

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

  • PlaceboBiological

    Before reconstitution:

    Lyophilized powder for reconstitution in single-use vials

    After reconstitution with BFA03 adjuvant:

    Milk-white solution with no visible foreign matter

Study groups in NCT05398848
Study groupRoleWhat they receive
Recombinant two-component COVID-19 vaccine (CHO cell)ExperimentalAntigen: NTD-RBD-foldon protein, Adjuvant (BFA03)
Receives: Biological: Recombinant two-component COVID-19 vaccine (CHO cell)
PlaceboPlacebo comparatorAdjuvant (BFA03)
Receives: Biological: Placebo

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. To evaluate the efficacy of ReCOV in preventing Reverse Transcription-Polymerase Chain Reaction (RT-PCR) confirmed symptomatic COVID-19 in adults

    RT-PCR confirmed symptomatic COVID-19 cases (regardless of severity) that occurred > 14 days after 3 doses vaccination.

    Measured: > 14 days after 3 doses vaccination.

Secondary outcomes (9)
  1. Evaluate the safety and reactogenicity

    The occurrence of solicited local and systemic adverse events (AEs) within 7 days after each vaccination.

    Measured: within 7 days after each vaccination

  2. Evaluate the safety and reactogenicity

    The occurrence of unsolicited AEs from the 1st dose to 28 days after the 3rd vaccination

    Measured: from the 1st dose to 28 days after the 3rd vaccination.

  3. Evaluate the safety and reactogenicity

    The occurrence of serious adverse events (SAEs) and adverse events of special interest (AESIs) from the 1st dose to the end of study.

    Measured: from the 1st dose to the end of study.

  4. To evaluate the efficacy of ReCOV in preventing RT-PCR confirmed symptomatic COVID-19 with various severity in adults

    RT-PCR confirmed moderate, severe, critical COVID -19, or death that occurred > 14 days after 3 doses vaccination

    Measured: > 14 days after 3 doses vaccination.

  5. To evaluate the efficacy of ReCOV in preventing RT-PCR confirmed symptomatic COVID-19 with various severity in adults

    RT-PCR confirmed severe, critical COVID-19, or death that occurred > 14 days after 3 doses vaccination.

    Measured: > 14 days after 3 doses vaccination.

  6. To evaluate the efficacy of ReCOV in preventing RT-PCR confirmed symptomatic COVID-19 with various severity in adults

    RT-PCR confirmed symptomatic COVID-19 cases (regardless of severity) that occurred > 14 days after 3 doses vaccination in different age groups (18-59 years and ≥ 60 years ).

    Measured: > 14 days after 3 doses vaccination in different age groups (18-59 years and ≥ 60 years ).

  7. To evaluate the immunogenicity of ReCOV

    The seroconversion rate (SCR), geometric mean titer (GMT) and geometric mean increase (GMI) of neutralizing antibody against prototype and epidemic strain at 14 days, 3 months and 6 months after 3 doses vaccination.

    Measured: at 14 days, 3 months and 6 months after 3 doses vaccination

  8. To compare the immunogenicity of ReCOV between Asian and Non-Asian in the immunogenicity subgroup

    The SCR and GMT of neutralizing antibody against prototype at 14 days,3 months and 6 months after 3 doses vaccination.

    Measured: at 14 days,3 months and 6 months after 3 doses vaccination

  9. Genotyping of SARS-CoV-2 virus nucleic acid sequence of COVID-19 cases to evaluate the possible viral mutations

    SARS-CoV-2 virus nucleic acid sequence of RT-PCR confirmed symptomatic COVID-19 cases that occurred >14 days after 3 doses vaccination derived from isolates or direct nasopharyngeal (NP) (preferred)/ oropharyngeal (OP) swab, or respiratory samples (including saliva samples, or bronchoalveolar lavage fluid, if applicable).

    Measured: >14 days after 3 doses vaccination

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted1 Jun 2022
  2. Study start31 Oct 2022
  3. Primary completion4 Sep 2023
  4. Study completion29 Dec 2023

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 3
Primary purpose
Prevention
Allocation
Randomised
Intervention model
Parallel groups
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
7,623 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05398848
Sponsor's protocol ID
REC611C303
Status last verified
Feb 2024
First submitted
30 May 2022
Last updated
29 Feb 2024
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No: There is not a plan to make individual participant data (IPD) available

Questions about this trial

What is this clinical trial studying?

A Phase 3 study testing Recombinant two-component COVID-19 vaccine (CHO cell) in people with COVID-19, run by Jiangsu Rec-Biotechnology Co., Ltd. at 11 sites in 2 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 10 inclusion and 18 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 29 Feb 2024. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 11 sites in Russia, Nepal. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

To evaluate the efficacy of ReCOV in preventing Reverse Transcription-Polymerase Chain Reaction (RT-PCR) confirmed symptomatic COVID-19 in adults (time frame: > 14 days after 3 doses vaccination.). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 29 Feb 2024.

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