Efficacy, Immunogenicity, and Safety Study of a Respiratory Syncytial Virus Vaccine in Infants and Toddlers

NCT ID: NCT06252285

Last Updated: 2025-01-14

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

ACTIVE_NOT_RECRUITING

Clinical Phase

PHASE3

Total Enrollment

6300 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-02-06

Study Completion Date

2027-12-07

Brief Summary

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This study is a phase III, randomized, observer-blind, placebo-controlled, multinational, multi-center study to be conducted in approximately 6300 children 6 months to \< 22 months of age. The purpose of the study is to evaluate the efficacy, immunogenicity, and safety of Respiratory Syncytial Virus Toddler (RSVt) vaccine administered by intranasal route compared to placebo.

Eligible participants will be randomized in a 1:1 ratio to receive 2 intranasal administrations of either the RSVt vaccine or placebo.

Study duration will be 24 months for each participant. The safety follow-up will start after the first vaccination and up to the end of the study.

Detailed Description

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Study duration will be 24 months for each participant. The safety follow-up will start at inclusion and up to the end of the study.

Conditions

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RSV Immunisation

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

TRIPLE

Participants Investigators Outcome Assessors
* Blinding for vaccine group assignment: participants, parents or legally acceptable representatives (LARs), outcome assessors, investigators, laboratory personnel, Sponsor study staff
* No blinding for study staff who prepare and administer the study interventions

Study Groups

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Group 1 RSVt Vaccine

Participants will receive 2 intranasal administrations of RSVt vaccine

Group Type EXPERIMENTAL

RSVt Vaccine

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension of virus in a nasal spray-Route of administration:Intranasal

Group 2 Control

Participants will receive 2 intranasal administrations of placebo

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type BIOLOGICAL

Pharmaceutical form:Suspension of virus in a nasal spray-Route of administration:Intranasal

Interventions

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RSVt Vaccine

Pharmaceutical form:Suspension of virus in a nasal spray-Route of administration:Intranasal

Intervention Type BIOLOGICAL

Placebo

Pharmaceutical form:Suspension of virus in a nasal spray-Route of administration:Intranasal

Intervention Type BIOLOGICAL

Other Intervention Names

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534

Eligibility Criteria

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Inclusion Criteria

* Participants who are healthy as determined by medical evaluation including medical history
* Born at full term of pregnancy (≥ 37 weeks)

Exclusion Criteria

* Known or suspected congenital or acquired immunodeficiency; or receipt of immunosuppressive therapy, such as anti-cancer chemotherapy or radiation therapy, within the preceding 6 months; or long-term systemic corticosteroid therapy (prednisone or equivalent for more than 2 consecutive weeks within the past 3 months)
* Known systemic hypersensitivity to any of the study intervention components, or history of a life-threatening reaction to the study intervention used in the study or to a product containing any of the same substances
* Chronic illness that, in the opinion of the investigator, is at a stage where it might interfere with study conduct or completion
* History of medically diagnosed wheezing
* Any acute febrile illness in the past 48 hours that according to investigator judgment is significant enough to interfere with successful inoculation on the day of vaccination. A prospective participant should not be included in the study until the condition has resolved or the febrile event has subsided.
* Probable or confirmed ongoing case of viral respiratory infection (including COVID-19, influenza, rhinovirus, etc.) at the time of enrollment. A prospective participant should not be included in the study until the respiratory infection has resolved.
* Member of a household that contains an immunocompromised individual, including, but not limited to:

* a person who is HIV infected
* a person who has received chemotherapy within the 12 months prior to study enrollment
* a person who has received (within the past 6 months) or is receiving (at the time of enrollment) immunosuppressant agents
* a person living with a solid organ or bone marrow transplant
* Potential close contact with other immunocompromised individual within 30 days after each vaccination as per investigator's discretion
* Participant's biological mother's previous receipt or planned administration of an investigational RSV vaccine during pregnancy and/or breastfeeding.
* Receipt or planned receipt of any of the following vaccines prior to enrollment or after the first study intervention administration:

* Any other intranasal live attenuated vaccine within the 28 days prior to and after Dose 1 study administration
* Unless given on the day of Dose 1 study administration, any other injectable live attenuated vaccines within the 28 days prior to and after. Concomitant receipt on the day of Dose 1 study administration is allowed.
* Previous receipt of an investigational RSV vaccine or receiving any anti-RSV product (such as ribavirin or RSV immune globulin) at the time of enrollment. Previous receipt of an RSV monoclonal antibody within 6 months prior to the first study vaccine administration.
* Receipt of immune globulins, blood or blood-derived products in the past 3 months
* Receipt of intranasal and intra-ocular medications within 3 days prior to study enrollment
* Participation at the time of study enrollment or planned participation during the present study period in another clinical study investigating a vaccine, drug, medical device, or medical procedure The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.
Minimum Eligible Age

6 Months

Maximum Eligible Age

21 Months

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Sanofi Pasteur, a Sanofi Company

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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Central Research Associates - Flourish - PPDS- Site Number : 8400009

Birmingham, Alabama, United States

Site Status

Lakeview Clinical Research- Site Number : 8400024

Guntersville, Alabama, United States

Site Status

Novak Clinical Research- Site Number : 8400069

Tucson, Arizona, United States

Site Status

Madera Family Medical Group- Site Number : 8400029

Madera, California, United States

Site Status

Integrated Clinical Research- Site Number : 8400056

Tarzana, California, United States

Site Status

National Institute of Clinical Research - Victorville - ClinEdge - PPDS- Site Number : 8400040

Victorville, California, United States

Site Status

Invictus Clinical Research Group- Site Number : 8400035

Coconut Creek, Florida, United States

Site Status

Site Number : 8400031

Doral, Florida, United States

Site Status

Accel Research - Nona Pediatric Center- Site Number : 8400068

Orlando, Florida, United States

Site Status

TrueBlue Clinical Research- Site Number : 8400065

Tampa, Florida, United States

Site Status

Teena Hughes Pediatrics- Site Number : 8400042

Tampa, Florida, United States

Site Status

Morehouse School of Medicine - Atlanta- Site Number : 8400037

Atlanta, Georgia, United States

Site Status

Emory-Children's Center- Site Number : 8400001

Atlanta, Georgia, United States

Site Status

Agile Clinical Research Trials- Site Number : 8400015

Atlanta, Georgia, United States

Site Status

Tekton Research, LLC - 4961 Buford Hwy - Georgia - PPDS- Site Number : 8400064

Chamblee, Georgia, United States

Site Status

Velocity Clinical Research - (Macon - Georgia) - PPDS- Site Number : 8400041

Macon, Georgia, United States

Site Status

iResearch Savannah - CenExel - PPDS- Site Number : 8400032

Savannah, Georgia, United States

Site Status

Medical Research Partners - Ammon- Site Number : 8400059

Ammon, Idaho, United States

Site Status

Clinical Research Prime- Site Number : 8400013

Idaho Falls, Idaho, United States

Site Status

Leavitt Women's Healthcare- Site Number : 8400033

Idaho Falls, Idaho, United States

Site Status

Snake River Research- Site Number : 8400046

Idaho Falls, Idaho, United States

Site Status

Michigan Institute of Research- Site Number : 8400055

Allen Park, Michigan, United States

Site Status

Vida Clinical Studies - Dearborn Heights- Site Number : 8400072

Dearborn Heights, Michigan, United States

Site Status

Great Lakes Research Institute- Site Number : 8400060

Southfield, Michigan, United States

Site Status

Clinical Research Institute - Minneapolis- Site Number : 8400011

Minneapolis, Minnesota, United States

Site Status

Boeson Research - Great Falls- Site Number : 8400008

Great Falls, Montana, United States

Site Status

Velocity Clinical Research - Hastings- Site Number : 8400017

Hastings, Nebraska, United States

Site Status

Be Well Clinical Studies - Lincoln- Site Number : 8400058

Lincoln, Nebraska, United States

Site Status

Velocity Clinical Research (Norfolk - Nebraska) - PPDS- Site Number : 8400038

Norfolk, Nebraska, United States

Site Status

Quality Clinical Research - Omaha - Regency Circle- Site Number : 8400016

Omaha, Nebraska, United States

Site Status

Velocity Clinical Research - Omaha- Site Number : 8400054

Omaha, Nebraska, United States

Site Status

Prime Global Research, Inc.- Site Number : 8400043

The Bronx, New York, United States

Site Status

Cincinnati Children's Hospital Medical Center- Site Number : 8400063

Cincinnati, Ohio, United States

Site Status

Senders Pediatrics- Site Number : 8400006

South Euclid, Ohio, United States

Site Status

Cyn3rgy Research- Site Number : 8400014

Gresham, Oregon, United States

Site Status

Medical University of South Carolina - Charleston - Jonathan Lucas Street- Site Number : 8400036

Charleston, South Carolina, United States

Site Status

Palmetto Pediatrics- Site Number : 8400012

North Charleston, South Carolina, United States

Site Status

Parkside Pediatrics - Simpsonville- Site Number : 8400071

Simpsonville, South Carolina, United States

Site Status

Clinical Research Associates Inc- Site Number : 8400005

Nashville, Tennessee, United States

Site Status

Tekton Research, LLC - Beaumont - PPDS- Site Number : 8400061

Beaumont, Texas, United States

Site Status

South Texas Urgent Care - Del Rio- Site Number : 8400062

Del Rio, Texas, United States

Site Status

Ventavia Research Group - Fort Worth- Site Number : 8400022

Fort Worth, Texas, United States

Site Status

Private Practice - Dr. Chinyere N. Awa- Site Number : 8400066

Houston, Texas, United States

Site Status

DM Clinical Research - CyFair Clinical Research Center- Site Number : 8400044

Houston, Texas, United States

Site Status

Maximos Ob/Gyn- Site Number : 8400023

League City, Texas, United States

Site Status

Pediatric Center - Richmond- Site Number : 8400019

Richmond, Texas, United States

Site Status

Tekton Research - FM78- Site Number : 8400067

San Antonio, Texas, United States

Site Status

Alliance for Multispecialty Research - Layton - North Robins Drive- Site Number : 8400030

Layton, Utah, United States

Site Status

Wee Care Pediatrics - Roy- Site Number : 8400002

Roy, Utah, United States

Site Status

Wee Care Pediatrics - Syracuse- Site Number : 8400004

Syracuse, Utah, United States

Site Status

Investigational Site Number : 0320006

Buenos Aires, Buenos Aires F.D., Argentina

Site Status

Investigational Site Number : 0320007

Buenos Aires, Buenos Aires F.D., Argentina

Site Status

Investigational Site Number : 0320003

Río Cuarto, Córdoba Province, Argentina

Site Status

Investigational Site Number : 0320005

Rosario, Santa Fe Province, Argentina

Site Status

Investigational Site Number : 0320004

San Miguel de Tucumán, Tucumán Province, Argentina

Site Status

Investigational Site Number : 0320002

San Miguel de Tucumán, Tucumán Province, Argentina

Site Status

Investigational Site Number : 0320001

Buenos Aires, , Argentina

Site Status

Associação Obras Sociais Irmã Dulce - Centro de Pesquisa ClÃ-nica (CPEC)- Site Number : 0760009

Salvador, Estado de Bahia, Brazil

Site Status

Freire Pesquisa Clínica- Site Number : 0760001

Belo Horizonte, Minas Gerais, Brazil

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Hospital de Clinicas de Porto Alegre- Site Number : 0760005

Porto Alegre, Rio Grande do Sul, Brazil

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Hospital Ernesto Dornelles- Site Number : 0760007

Porto Alegre, Rio Grande do Sul, Brazil

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Hospital Das Clinicas da Faculdade de Medicina de Ribeirão Preto - USP - PPDS- Site Number : 0760010

Ribeirão Preto, São Paulo, Brazil

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Fundação Faculdade Regional de Medicina de São José do Rio Preto- Site Number : 0760006

São José do Rio Preto, São Paulo, Brazil

Site Status

Hospital São Paulo da Universidade Federal de Sao Paulo - Escola Paulista de Medicina UNIFESP-EPM- Site Number : 0760002

SãO Paulo, São Paulo, Brazil

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Centro Paulista de Investigaçăo Clínica - CEPIC- Site Number : 0760004

São Paulo, , Brazil

Site Status

Investigational Site Number : 1520004

Santiago, Reg Metropolitana de Santiago, Chile

Site Status

Investigational Site Number : 1520001

Santiago, Reg Metropolitana de Santiago, Chile

Site Status

Investigational Site Number : 1520005

Port Montt, , Chile

Site Status

Investigational Site Number : 1560009

Jiangsu, , China

Site Status

Investigational Site Number : 1700004

Acacías, , Colombia

Site Status

Investigational Site Number : 1700002

Chía, , Colombia

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Investigational Site Number : 1700003

Girardot, , Colombia

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Investigational Site Number : 2460003

Espoo, , Finland

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Investigational Site Number : 2460005

Helsinki, , Finland

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Investigational Site Number : 2460008

Järvenpää, , Finland

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Investigational Site Number : 2460004

Kokkola, , Finland

Site Status

Investigational Site Number : 2460002

Oulu, , Finland

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Investigational Site Number : 2460006

Seinäjoki, , Finland

Site Status

Investigational Site Number : 2460009

Tampere, , Finland

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Investigational Site Number : 2460001

Turku, , Finland

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Investigational Site Number : 3920011

Sapporo, Hokkaido, Japan

Site Status

Investigational Site Number : 3920007

Kawagoe, Saitama, Japan

Site Status

Investigational Site Number : 3920010

Shizuoka-Shi Aoi-Ku, Shizuoka, Japan

Site Status

Investigational Site Number : 3920006

Edogawa-Ku, Tokyo, Japan

Site Status

Investigational Site Number : 3920001

Fukui, , Japan

Site Status

Investigational Site Number : 3920002

Fukui-shi, , Japan

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Investigational Site Number : 3920004

Fukuoka, , Japan

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Investigational Site Number : 3920003

Kagoshima, , Japan

Site Status

Investigational Site Number : 3920005

Kasuga-Shi, , Japan

Site Status

Investigational Site Number : 3920008

Lizuka-shi, , Japan

Site Status

Investigational Site Number : 3920009

Osaka, , Japan

Site Status

Investigational Site Number : 4040007

Butere, , Kenya

Site Status

Investigational Site Number : 4040001

Kericho, , Kenya

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Investigational Site Number : 4040002

Kisumu, , Kenya

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Investigational Site Number : 4040003

Kisumu, , Kenya

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Investigational Site Number : 4040006

Nairobi, , Kenya

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Investigational Site Number : 4840007

Mexico City, , Mexico

Site Status

Investigational Site Number : 4840008

Monterrey, , Mexico

Site Status

Investigational Site Number : 4840004

Veracruz, , Mexico

Site Status

Investigational Site Number : 5240003

Dhulikhel N.p, Bagmati, Nepal

Site Status

Investigational Site Number : 5240001

Kathmandu, Bagmati, Nepal

Site Status

Investigational Site Number : 5240002

Nepalgunj, Bheri, Nepal

Site Status

Clinical Research Investigator Group- Site Number : 6300001

Bayamón, , Puerto Rico

Site Status

Clinical Research Puerto Rico (CRPR), Inc. - Guayama- Site Number : 6300005

Guayama, , Puerto Rico

Site Status

Caribbean Medical Research Center- Site Number : 6300003

San Juan, , Puerto Rico

Site Status

Hospital Pediatrico Universitario- Site Number : 6300002

San Juan, , Puerto Rico

Site Status

Investigational Site Number : 7100007

Brits, , South Africa

Site Status

Investigational Site Number : 7100008

City of Cape Town, , South Africa

Site Status

Investigational Site Number : 7100001

East London, , South Africa

Site Status

Investigational Site Number : 7100005

Johannesburg, , South Africa

Site Status

Investigational Site Number : 7100004

Johannesburg, , South Africa

Site Status

Investigational Site Number : 7100003

Johannesburg, , South Africa

Site Status

Investigational Site Number : 7100006

Paarl, , South Africa

Site Status

Investigational Site Number : 7100002

Pretoria, , South Africa

Site Status

Investigational Site Number : 7100009

Soshanguve, , South Africa

Site Status

Investigational Site Number : 7240001

Barcelona, Barcelona [Barcelona], Spain

Site Status

Investigational Site Number : 7240003

Móstoles, Madrid, Spain

Site Status

Investigational Site Number : 7240005

Pamplona, Navarre, Spain

Site Status

Investigational Site Number : 7240002

Seville, Sevilla, Spain

Site Status

Investigational Site Number : 7240004

Santiago de Compostela, , Spain

Site Status

Investigational Site Number : 7640002

Bangkok, , Thailand

Site Status

Investigational Site Number : 7640005

Bangkok, , Thailand

Site Status

Investigational Site Number : 7640004

Bangkok, , Thailand

Site Status

Investigational Site Number : 7640001

Chiang Mai, , Thailand

Site Status

Investigational Site Number : 7640006

Hat Yai, , Thailand

Site Status

Investigational Site Number : 7640003

Khon Kaen, , Thailand

Site Status

Investigational Site Number : 8260003

Hayle, Cornwall, United Kingdom

Site Status

Investigational Site Number : 8260005

Exeter, Devon, United Kingdom

Site Status

Investigational Site Number : 8260007

Southampton, Hampshire, United Kingdom

Site Status

Investigational Site Number : 8260004

Bristol, , United Kingdom

Site Status

Countries

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United States Argentina Brazil Chile China Colombia Finland Japan Kenya Mexico Nepal Puerto Rico South Africa Spain Thailand United Kingdom

Other Identifiers

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VAD00004

Identifier Type: -

Identifier Source: org_study_id

2023-505762-29

Identifier Type: REGISTRY

Identifier Source: secondary_id

U1111-1280-7192

Identifier Type: REGISTRY

Identifier Source: secondary_id

VAD00004

Identifier Type: OTHER

Identifier Source: secondary_id

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