A controlled Phase 2/3 study of adjuvanted recombinant SARS-CoV-2 trimeric S-protein vaccine (SCB-2019) for the prevention of COVID-19

Phase 1

Active, not recruiting

• Conditions: SARS-CoV-2-mediated COVID-19; MedDRA version: 23.1Level: LLTClassification code 10084465Term: COVID-19 vaccinationSystem Organ Class: 100000004865; Therapeutic area: Diseases [C] - Virus Diseases [C02]

• Registration Number: EUCTR2020-004272-17-BE
• Lead Sponsor: Clover Biopharmaceuticals AUS Pty Ltd

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Study Start: 2020-11-18
• Last Update Posted: 28 August 2023

Recruitment & Eligibility

• Status: Not Recruiting
• Sex: All
• Target Recruitment: 30000

Inclusion Criteria

1. Male or females =12 years of age, inclusive.
2. Participants who are willing and able to comply with study requirements, including all scheduled visits, vaccinations, laboratory tests, the electronic completion of the COVID-19 ePRO and other study procedures.
3. Healthy adult or adolescent subjects or adult or adolescent subjects with pre-existing medical conditions who are in stable condition.
4. 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.
Note: The first 200 individuals enrolled in the Phase 2 part of the study should be healthy subjects 18 to 64 years or age without comorbidities associated with a high risk of severe COVID-19.
5. Female subjects who are WOCBP are eligible to participate in the study if not pregnant, not breastfeeding, and at least 1 of the following criteria apply:
• WOCBP must have a negative urine pregnancy test prior to each vaccination. A confirmatory serum pregnancy test may be conducted at the Investigator’s discretion. They must be using a highly effective licensed method of birth control for 30 days prior to the first vaccination and must agree to continue such precautions during the study until 90 days after the second vaccination.
6. Male subjects must agree to employ acceptable contraception from the day of first dose of the study vaccine/placebo until 6 months after the last dose of the study vaccine/placebo and also refrain from donating sperm during this period.
7. Individuals (or their legally acceptable representative based on local regulations) willing and able to give an informed consent, prior to screening. For adolescent subjects: informed assent signed by adolescents and informed consent signed by the parent(s) or legally acceptable representative(s) as per local requirements.
8. Applicable for HIV-positive individuals only:
HIV positive individuals can participate in the study only if,
- They are medically stable at screening, as determined by the investigator, and free of opportunistic infections in the 1 year prior to first study vaccination, and
- They have an HIV-1 viral load <1000 copies/mL within 45 days of randomization in the study, and
- They are receiving highly active antiretroviral therapy (HAART) for at least 3 months before screening. Changes in antiretroviral dosage within 3 months of entering the study are allowed, as are exchanges in pharmacological formulations.
Note 1: No HIV screening is required except participants in South Africa due to the high prevalence of HIV, prior to study enrollment, individuals without recent HIV testing (within previous 6 months), should undergo screening for HIV using an approved method, as per site standard medical practice to determine if they can participate in the study.
Note 2: Inclusion criteria should also be used to determine whether the placebo recipient is eligible to receive SCB-2019 or SCB-2019 recipient is eligible to participate in booster cohort. Additional inclusion criterion for SCB-2019 recipients from Phase 3 part of the study to participate in the booster cohort:
9. Participants who have received 2 prior doses of SCB-2019 vaccine with at least 4 months between the second vaccination and the booster dose.
Are the trial subjects under 18? yes
Number of subjects for this age range: 1200
F.1.2 Adults (18-64 years) yes
F.1.2.1 Number of subjects for this age range 29500
F.1.3 Elderly (>=65 years) yes

Exclusion Criteria

1. Individuals with laboratory-confirmed SARS-CoV-2 infection (e.g., a positive RT-PCR or Rapid COVID-19 antigen test) at screening or within 14 days prior to enrollment.
2. Individuals with behavioral or cognitive impairment (including drug and alcohol abuse) in the opinion of the Investigator.
3. Individuals with any progressive or severe neurologic disorder, seizure disorder, or history of Guillian-Barré syndrome.
4. Individuals who receive treatment with immunosuppressive therapy, including cytotoxic agents or systemic corticosteroids, e.g., for cancer or an autoimmune disease, or planned receipt during the study period. If a short-term course of systemic corticosteroids have been administered for treatment of an acute illness, participants should not be enrolled into the study until corticosteroid therapy has been discontinued for at least 30 days before the first study vaccination. A unique dose of systemic steroids on a single day would be allowed, as well as inhaled/nebulized, intra-articular, intrabursal, or topical (skin or eyes) corticosteroids are permitted.
5. Individuals who are pregnant, or breastfeeding, or planning to become pregnant during the study period.
6. Individuals who have a history of severe adverse reaction associated with a vaccine or severe allergic reaction (e.g., anaphylaxis) to any component of the study vaccine (SCB-2019, CpG 1018 Adjuvant and Aluminum hydroxide/SCB-2019 components as outlined in the latest IB).
7. Individuals who have a history of malignancy within 1 year before screening (exceptions are squamous and basal cell carcinomas of the skin and carcinoma in situ of the cervix which have been cured, or other malignancies with minimal risk of recurrence).
8. Individuals who have received any other investigational product within 30 days prior to Day 1 or intent to participate in another clinical study at any time during the conduct of this study.
9. Individuals who have received previous vaccination with any coronavirus vaccine.
10. Individuals who have received any other licensed vaccines within 14 days prior to enrollment in this study or who are planning to receive any vaccine up to 14 days after the second vaccination.
11. Individuals with known bleeding disorder that would, in the opinion of the investigator, contraindicate intramuscular injection.
12. Individuals who received any blood/plasma products or immunoglobulins within 60 days prior to Day 1 or plan to receive it during the study period.
13. Individuals with any condition that, in the opinion of the Investigator, may increase the risk of study participation or interfere with the assessment of the primary study objectives
14. Individuals with fever >37.8°C (irrespective of method), or any acute illness at baseline (Day 1) or within 3 days of randomization. Participants meeting this criterion may be rescheduled within the relevant window. A febrile participant with minor illness can be enrolled at the discretion of the investigator.
Note: Exclusion criteria should also be used to determine whether the placebo subject is eligible to receive SCB-2019 or SCB-2019 recipient is eligible to participate in booster cohort.

Study & Design

• Study Type: Interventional clinical trial of medicinal product
• Study Design: Not specified