Safety and Immunogenicity of SCB-2019 in Children <18 Years of Age

Clover Biopharmaceuticals

Status and phase: Withdrawn; Phase 3; Phase 2

Conditions: COVID-19

Treatments: Biological: Candidate vaccine, SCB-2019

Study type: Interventional

Funder types: Industry

Identifiers

NCT05193279

CLO-SCB-2019-007

Details and patient eligibility

About

This is a phase 2/3, randomized, controlled study to assess the reactogenicity, safety and immunogenicity of adjuvanted recombinant SARS-CoV-2 trimeric S-protein subunit vaccine (SCB-2019), when administered as 2-dose vaccination series in children below 18 years of age.

Sex: All

Ages: Under 17 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Male or female <18 years of age. Participants will be stratified into different age cohorts (≥12 to < 18 years, ≥5 to < 12 years, ≥2 to < 5 years, and < 2 years of age) based on the age on the day of inclusion.
• Individuals and their legally authorized representative (LAR) are willing and able to comply with study requirements, including all scheduled visits, vaccinations, laboratory tests and other study procedures.
• Individuals are willing and able to give an assent (if applicable) and their LARs are willing and able to give informed consent on their behalf, prior to screening
• Healthy participants (phase 2 and phase 3) or participants with pre-existing medical conditions who are in a stable medical condition (phase 2)
• For infants (<1-year-old) - born at full term (gestational age ≥37 weeks) and with a normal birth weight (≥2500 grams).
• Female participants of childbearing potential may be enrolled in the study, if the participant has practiced highly effective contraception for 30 days prior to vaccination, and has a negative pregnancy test on the day of vaccination and has agreed to continue adequate contraception for 3 months after the last vaccination

Exclusion criteria

• Individuals with fever >38.0°C [≥ 100.4°F] (irrespective of method used), or any acute illness at baseline (Day 1) or within 3 days prior to randomization.
• Individuals with laboratory-confirmed SARS-CoV-2 infection [as defined by Rapid COVID Antigen Test or an equivalent at Day 1] or with history of laboratory-confirmed/medically-diagnosed COVID-19 (for phase 2 participants only).
• Individuals who have received an investigational or licensed COVID-19 vaccine prior to Day 1, or plan to receive an investigational or licensed COVID-19 vaccine during the study period.
• Any confirmed or suspected immunosuppressive or immunodeficient condition resulting from disease [e.g., malignancy, human immunodeficiency virus (HIV) infection] or immunosuppressive/cytotoxic therapy (e.g., systemic corticosteroids, medications used for cancer chemotherapy, organ transplantation or to treat autoimmune disorders) within 3 months prior to Day 1. Inhaled, intranasal, topical steroids as well as a single dose of systemic steroids, are allowed.
• Individuals with any progressive or severe neurologic disorder, seizure disorder (including febrile seizures) or history of Guillain-Barré syndrome.
• Individuals who are pregnant, or breastfeeding, or planning to become pregnant while enrolled in this study or during the study period.
• Individuals who have a history of severe adverse reaction associated with a vaccine or severe allergic reaction
• Individuals who have received any other investigational product within 30 days prior to Day 1 or intend to participate in another clinical study at any time during the conduct of this study.
• 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 28 days after the second (phase 2) or third (phase 3) vaccination.
• Individuals with known bleeding disorder that would, in the opinion of the investigator, contraindicate intramuscular injection
• Administration of intravenous immunoglobulins and/or any blood products within 3 months prior to enrollment or planned administration during the study period
• Individuals with any condition that, in the opinion of the investigator, would interfere with the primary study objectives or pose additional risk to the participant

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Quadruple Blind

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0 participants in 21 patient groups

SCB-2019/SCB-2019/placebo, 12 to < 18 yrs

Experimental group

Description:

Day 1 and 22: SCB-2019, Day 43: placebo

Treatment:

Biological: Candidate vaccine, SCB-2019

Placebo/SCB-2019/SCB-2019, 12 to < 18 years

Experimental group

Description:

Day 1: placebo, Day 22 and 43: SCB-2019

Treatment:

Biological: Candidate vaccine, SCB-2019

SCB-2019/placebo/SCB-2019, 12 to < 18 years

Experimental group

Description:

Day 1 and 43: SCB-2019, Day 22: placebo

Treatment:

Biological: Candidate vaccine, SCB-2019

Low dose SCB-2019, 5 to < 12 years

Experimental group

Description:

Day 1 and 22: SCB-2019

Treatment:

Biological: Candidate vaccine, SCB-2019

Mid dose SCB-2019, 5 to < 12 years

Experimental group

Description:

Day 1 and 22: SCB-2019

Treatment:

Biological: Candidate vaccine, SCB-2019

High dose SCB-2019, 5 to < 12 years

Experimental group

Description:

Day 1 and 22: SCB-2019

Treatment:

Biological: Candidate vaccine, SCB-2019

SCB-2019/SCB-2019/placebo, 5 to < 12 yrs

Experimental group

Description:

Day 1 and 22: SCB-2019, Day 43: placebo

Treatment:

Biological: Candidate vaccine, SCB-2019

Placebo/SCB-2019/SCB-2019, 5 to < 12 years

Experimental group

Description:

Day 1: placebo, Day 22 and 43: SCB-2019

Treatment:

Biological: Candidate vaccine, SCB-2019

SCB-2019/placebo/SCB-2019, 5 to < 12 years

Experimental group

Description:

Day 1 and 43: SCB-2019, Day 22: placebo

Treatment:

Biological: Candidate vaccine, SCB-2019

Low dose SCB-2019, 2 to < 5 years

Experimental group

Description:

Day 1 and 22: SCB-2019

Treatment:

Biological: Candidate vaccine, SCB-2019

Mid dose SCB-2019, 2 to < 5 years

Experimental group

Description:

Day 1 and 22: SCB-2019

Treatment:

Biological: Candidate vaccine, SCB-2019

High dose SCB-2019, 2 to < 5 years

Experimental group

Description:

Day 1 and 22: SCB-2019

Treatment:

Biological: Candidate vaccine, SCB-2019

SCB-2019/SCB-2019/placebo, 2 to < 5 yrs

Experimental group

Description:

Day 1 and 22: SCB-2019, Day 43: placebo

Treatment:

Biological: Candidate vaccine, SCB-2019

Placebo/SCB-2019/SCB-2019, 2 to < 5 years

Experimental group

Description:

Day 1: placebo, Day 22 and 43: SCB-2019

Treatment:

Biological: Candidate vaccine, SCB-2019

SCB-2019/placebo/SCB-2019, 2 to < 5 years

Experimental group

Description:

Day 1 and 43: SCB-2019, Day 22: placebo

Treatment:

Biological: Candidate vaccine, SCB-2019

Low dose SCB-2019, birth to < 2 years

Experimental group

Description:

Day 1 and 22: SCB-2019

Treatment:

Biological: Candidate vaccine, SCB-2019

Mid dose SCB-2019, birth to < 2 years

Experimental group

Description:

Day 1 and 22: SCB-2019

Treatment:

Biological: Candidate vaccine, SCB-2019

High dose SCB-2019, birth to < 2 years

Experimental group

Description:

Day 1 and 22: SCB-2019

Treatment:

Biological: Candidate vaccine, SCB-2019

SCB-2019/SCB-2019/placebo, birth to < 2 yrs

Experimental group

Description:

Day 1 and 22: SCB-2019, Day 43: placebo

Treatment:

Biological: Candidate vaccine, SCB-2019

Placebo/SCB-2019/SCB-2019, birth to < 2 years

Experimental group

Description:

Day 1: placebo, Day 22 and 43: SCB-2019

Treatment:

Biological: Candidate vaccine, SCB-2019

SCB-2019/placebo/SCB-2019, birth to < 2 years

Experimental group

Description:

Day 1 and 43: SCB-2019, Day 22: placebo

Treatment:

Biological: Candidate vaccine, SCB-2019