First-in-human Safety and Immunogenicity Study of SCB-1019 and SCB-1019T in Healthy Adults

NCT ID: NCT06194318

Last Updated: 2025-06-06

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE1

Total Enrollment

160 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-12-13

Study Completion Date

2025-05-07

Brief Summary

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First-in-human Safety and Immunogenicity Study of SCB-1019 and SCB-1019T in Healthy Adults

Detailed Description

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A Phase 1, placebo-controlled, randomized, observer-blind, First-in-human Study to describe the Safety, reactogenicity and immunogenicity of a bivalent recombinant RSV vaccines (SCB-1019 and SCB-1019T) in healthy adults

Conditions

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Respiratory Syncytial Virus Vaccination

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

QUADRUPLE

Participants Caregivers Investigators Outcome Assessors

Study Groups

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group 1 (SCB-1019 low dose with Alum; young adults)

4 young adults (18-59 years old) will receive SCB-1019 (Low Dose with Alum) at Day 1

Group Type EXPERIMENTAL

Candidate vaccine, SCB-1019

Intervention Type BIOLOGICAL

The SCB-1019 vaccine contains RSV F protein subunits from the two dominant circulating strains, A strain (SCB-1019A) and B strain (SCB-1019B). SCB-1019A and SCB-1019B are recombinant RSV F-Trimer proteins engineered by fusing the ectodomain of RSV F protein with Trimer-Tag™

group 2 (Placebo; young adults)

2 young adults (18-59 years old) will receive Placebo at Day 1

Group Type PLACEBO_COMPARATOR

placebo

Intervention Type BIOLOGICAL

placebo

group 3 (SCB-1019 high dose with Alum; Young Adults)

4 young adults (18-59 years old) will receive SCB-1019 (high dose with Alum) at Day 1

Group Type EXPERIMENTAL

Candidate vaccine, SCB-1019

Intervention Type BIOLOGICAL

The SCB-1019 vaccine contains RSV F protein subunits from the two dominant circulating strains, A strain (SCB-1019A) and B strain (SCB-1019B). SCB-1019A and SCB-1019B are recombinant RSV F-Trimer proteins engineered by fusing the ectodomain of RSV F protein with Trimer-Tag™

group 4 (Placebo; young adults)

2 young adults (18-59 years old) will receive Placebo at Day 1

Group Type PLACEBO_COMPARATOR

placebo

Intervention Type BIOLOGICAL

placebo

group 5 (SCB-1019 low dose without Alum; older adults)

10 older adults (60-85 years old) will receive SCB-1019 (low dose without Alum) at Day 1

Group Type EXPERIMENTAL

Candidate vaccine, SCB-1019

Intervention Type BIOLOGICAL

The SCB-1019 vaccine contains RSV F protein subunits from the two dominant circulating strains, A strain (SCB-1019A) and B strain (SCB-1019B). SCB-1019A and SCB-1019B are recombinant RSV F-Trimer proteins engineered by fusing the ectodomain of RSV F protein with Trimer-Tag™

group 6 (SCB-1019 low dose with Alum; older adults)

10 older adults (60-85 years old) will receive SCB-1019 (low dose with Alum) at Day 1

Group Type EXPERIMENTAL

Candidate vaccine, SCB-1019

Intervention Type BIOLOGICAL

The SCB-1019 vaccine contains RSV F protein subunits from the two dominant circulating strains, A strain (SCB-1019A) and B strain (SCB-1019B). SCB-1019A and SCB-1019B are recombinant RSV F-Trimer proteins engineered by fusing the ectodomain of RSV F protein with Trimer-Tag™

group 7 (Placebo; older adults)

4 older adults (60-85 years old) will receive Placebo at Day 1

Group Type PLACEBO_COMPARATOR

placebo

Intervention Type BIOLOGICAL

placebo

group 8 (SCB-1019 high dose without Alum; older adults)

10 older adults (60-85 years old) will receive SCB-1019 (high dose without Alum) at Day 1

Group Type EXPERIMENTAL

Candidate vaccine, SCB-1019

Intervention Type BIOLOGICAL

The SCB-1019 vaccine contains RSV F protein subunits from the two dominant circulating strains, A strain (SCB-1019A) and B strain (SCB-1019B). SCB-1019A and SCB-1019B are recombinant RSV F-Trimer proteins engineered by fusing the ectodomain of RSV F protein with Trimer-Tag™

group 9 (SCB-1019 high dose with Alum; older adults)

10 older adults (60-85 years old) will receive SCB-1019 (high dose with Alum) at Day 1

Group Type EXPERIMENTAL

Candidate vaccine, SCB-1019

Intervention Type BIOLOGICAL

The SCB-1019 vaccine contains RSV F protein subunits from the two dominant circulating strains, A strain (SCB-1019A) and B strain (SCB-1019B). SCB-1019A and SCB-1019B are recombinant RSV F-Trimer proteins engineered by fusing the ectodomain of RSV F protein with Trimer-Tag™

group 10 (Placebo; older adults)

4 older adults (60-85 years old) will receive Placebo at Day 1

Group Type PLACEBO_COMPARATOR

placebo

Intervention Type BIOLOGICAL

placebo

Group 11 (SCB-1019T high dose without Alum; older adults)

30 older adults (60-85 years old) will receive SCB-1019T (high dose without Alum) at Day

Group Type EXPERIMENTAL

candidate vaccine, SCB-1019T

Intervention Type BIOLOGICAL

The SCB-1019T vaccines contain RSV F protein subunits from the two dominant circulating strains, A and B strain. Antigens are recombinant RSV F-Trimer proteins engineered by fusing the ectodomain of RSV F protein with Trimer-Tag™

Group 12 (AREXVY; older adults)

30 older adults (60-85 years old) will receive AREXVY at Day 1

Group Type ACTIVE_COMPARATOR

AREXVY

Intervention Type BIOLOGICAL

AREXVY is a FDA-approved respiratory syncytial virus (RSV) vaccine for adults aged 60 and older. Developed by GSK, it targets the prefusion F glycoprotein to protect against lower respiratory tract disease caused by RSV.

Group 13 (Placebo; older adults)

10 older adults (60-85 years old) will receive Placebo at Day 1

Group Type PLACEBO_COMPARATOR

placebo

Intervention Type BIOLOGICAL

placebo

Group 14 (SCB-1019T mid dose with Alum; older adults)

30 older adults (60-85 years old) will receive SCB-1019T (mid dose with Alum) at Day 1

Group Type EXPERIMENTAL

candidate vaccine, SCB-1019T

Intervention Type BIOLOGICAL

The SCB-1019T vaccines contain RSV F protein subunits from the two dominant circulating strains, A and B strain. Antigens are recombinant RSV F-Trimer proteins engineered by fusing the ectodomain of RSV F protein with Trimer-Tag™

Interventions

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Candidate vaccine, SCB-1019

The SCB-1019 vaccine contains RSV F protein subunits from the two dominant circulating strains, A strain (SCB-1019A) and B strain (SCB-1019B). SCB-1019A and SCB-1019B are recombinant RSV F-Trimer proteins engineered by fusing the ectodomain of RSV F protein with Trimer-Tag™

Intervention Type BIOLOGICAL

placebo

placebo

Intervention Type BIOLOGICAL

candidate vaccine, SCB-1019T

The SCB-1019T vaccines contain RSV F protein subunits from the two dominant circulating strains, A and B strain. Antigens are recombinant RSV F-Trimer proteins engineered by fusing the ectodomain of RSV F protein with Trimer-Tag™

Intervention Type BIOLOGICAL

AREXVY

AREXVY is a FDA-approved respiratory syncytial virus (RSV) vaccine for adults aged 60 and older. Developed by GSK, it targets the prefusion F glycoprotein to protect against lower respiratory tract disease caused by RSV.

Intervention Type BIOLOGICAL

Eligibility Criteria

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Inclusion Criteria

1. Male and female participants 60 to 85 years of age at the screening visit.
2. Individuals willing and able to comply with study requirements, including all scheduled visits, vaccination, laboratory tests, and other study procedures.
3. Individuals willing and able to give an informed consent, prior to screening. Healthy participants as determined by medical history, physical examination, and clinical judgment of the investigator; participants with pre-existing stable medical conditions can be included.

Exclusion Criteria

1. Acute disease or fever (≥38°C) at time of vaccination.
2. History of a severe adverse reaction associated with a vaccine or severe allergic reaction (e.g., anaphylaxis) to any component of the study vaccines.
3. Any progressive unstable or uncontrolled clinical conditions.
4. Any progressive or severe neurologic disorder, seizure disorder, or history of Guillain-Barré syndrome.
Minimum Eligible Age

18 Years

Maximum Eligible Age

85 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Clover Biopharmaceuticals AUS Pty

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Christopher Rook, MD

Role: PRINCIPAL_INVESTIGATOR

CMAX Clinical Research

Locations

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Fusion Clinical Research

Adelaide, Southern Australia, Australia

Site Status

Linear Clinical Research

Nedlands, Western Australia, Australia

Site Status

Countries

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Australia

Other Identifiers

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CLO-SCB-1019-001

Identifier Type: -

Identifier Source: org_study_id

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