Safety and Immunogenicity Study of Revaccination With SCB-1019T in Healthy Adults

NCT ID: NCT06843317

Last Updated: 2025-05-14

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

RECRUITING

Clinical Phase

PHASE1

Total Enrollment

160 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-03-21

Study Completion Date

2026-06-03

Brief Summary

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CLO-SCB-1019-002 is the first study of SCB-1019T vaccine for revaccination in older adults who were previously vaccinated with AREXVY. The safety, tolerability and immunogenicity of SCB-1019T are assessed.

Detailed Description

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The study design will compare heterologous revaccination with SCB-1019T, homologous revaccination with AREXVY, or placebo in adults who were previously vaccinated with AREXVY. The sample size for this study is not based on formal statistical hypothesis testing but is acceptable for safety and immunogenicity evaluation in a phase 1 study. The study will be overseen by a safety monitoring committee.

Conditions

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RSV Infection

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-1019T)

50 adults to receive low dose SCB-1019T at Day 1

Group Type EXPERIMENTAL

Candidate vaccine, SCB-1019T

Intervention Type BIOLOGICAL

SCB-1019T is a novel bivalent recombinant RSV vaccine (CHO Cell) designed to broadly neutralize the two dominant circulating strains of the virus. The SCB-1019T vaccine consists of the PreF protein subunits from the two dominant circulating strains, strain A and strain B, fused to Trimer-Tag™.

Group 2 (SCB-1019T)

50 adults to receive high dose SCB-1019T at Day 1

Group Type EXPERIMENTAL

Candidate vaccine, SCB-1019T

Intervention Type BIOLOGICAL

SCB-1019T is a novel bivalent recombinant RSV vaccine (CHO Cell) designed to broadly neutralize the two dominant circulating strains of the virus. The SCB-1019T vaccine consists of the PreF protein subunits from the two dominant circulating strains, strain A and strain B, fused to Trimer-Tag™.

Group 3 (AREXVY)

50 adults to receive AREXVY at Day 1

Group Type ACTIVE_COMPARATOR

AREXVY

Intervention Type BIOLOGICAL

positive comparator

Group 4 (Placebo)

10 adults to receive Placebo at Day 1

Group Type PLACEBO_COMPARATOR

placebo

Intervention Type OTHER

Placebo Comparator

Interventions

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Candidate vaccine, SCB-1019T

SCB-1019T is a novel bivalent recombinant RSV vaccine (CHO Cell) designed to broadly neutralize the two dominant circulating strains of the virus. The SCB-1019T vaccine consists of the PreF protein subunits from the two dominant circulating strains, strain A and strain B, fused to Trimer-Tag™.

Intervention Type BIOLOGICAL

AREXVY

positive comparator

Intervention Type BIOLOGICAL

placebo

Placebo Comparator

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

1. Male and female participants 60-85 years of age at the screening visit and who received AREXVY before.
2. Individuals are 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.
4. 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 (a stable medical condition is defined as a disease not requiring significant change in therapy or hospitalization for worsening disease during the 3 months before enrollment).

Exclusion Criteria

1. Acute disease or fever (≥38°C) at time of vaccination. Participants with a minor illness (mild diarrhea, mild upper respiratory infection) without fever may be enrolled at the discretion of the investigator. For participants with minor illness and/or fever at the time of vaccination, Visit 1 may be rescheduled within the allowed time-window.
2. Recurrent or un-controlled neurological disorders or seizures.
3. Serious or unstable chronic illnesses
4. Any history of dementia or any medical condition that moderately or severely impairs cognition
5. History of a severe adverse reaction associated with a vaccine or severe allergic reaction (e.g., anaphylaxis) to any component of the study vaccines.
Minimum Eligible Age

60 Years

Maximum Eligible Age

85 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Clover Biopharmaceuticals USA, LLC

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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AMR Phoenix

Phoenix, Arizona, United States

Site Status RECRUITING

AMR Fort Myers

Fort Myers, Florida, United States

Site Status RECRUITING

AMR Lexington

Lexington, Kentucky, United States

Site Status RECRUITING

AMR Kansas City

Kansas City, Missouri, United States

Site Status RECRUITING

Knoxville

Knoxville, Tennessee, United States

Site Status RECRUITING

Countries

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United States

Central Contacts

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Xuesong Pei, MD

Role: CONTACT

(+86) 18515445890

Facility Contacts

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William Reedy, MD

Role: primary

615-591-0211

Pedro Ylisastigui, MD

Role: primary

615-591-0211

Mark Adams, MD

Role: primary

615-591-0211

Martha Sue Fanning, MD

Role: primary

615-591-0211

Jerry B. Punch, MD

Role: primary

615-591-0211

Other Identifiers

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CLO-SCB-1019-002

Identifier Type: -

Identifier Source: org_study_id

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