A Study to Learn About the Safety and Immune Activity of RSVpreF in Children 2 to <18 Years of Age

Completed · Phase 1

Conditions studied: RESPIRATORY SYNCYTIAL VIRUS (RSV)

In brief

The purpose of this study is to learn about the safety and immune activity of the vaccine (called RSVpreF) in children 2 to \<18 years of age. This study will identify the dose level to be used in Phase 2/3 trials in this age cohort. All participants will receive one injection of RSVpreF. This study has four study visits, two in-clinic and two telehealth visits. Blood samples will be collected for testing. This study is about 6 months long for each participant and will be conducted in the United States.

Key facts

Study ID

NCT05900154

Run by

Pfizer

People needed

128

Starts

2023-06-22

Expected to finish

2024-02-29

Last updated by the study team

2025-03-06

Who can join

Age: 2 and older, up to 17. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Participants 2 to <18 years of age at enrollment
• Participants 2 to <18 years of age should either be healthy or be considered by the investigator to be at high risk of RSV disease based on the presence of 1 of the following chronic medical conditions:
• Cystic fibrosis
• Medically treated asthma
• Other chronic respiratory diseases and malformations of the lung
• Down syndrome
• Neuromuscular disease
• Cerebral palsy
• Hemodynamically significant or symptomatic congenital heart disease
• All participants 2 to <5 years of age must be seropositive for RSV as confirmed by serology.
• Participants' parent(s)/legal guardian(s) and participants, as age appropriate, who are willing and able to comply with all scheduled visits, investigational plan, laboratory tests, and other study procedures, including collection of nasal swabs by participants' parent(s)/legal guardian(s) and by study staff when indicated.
• The participant's parent(s)/legal guardian is capable of giving signed informed consent as described in the protocol. Depending on the age of the participant and according to local requirements, participants will also be asked to provide assent as appropriate (verbal or written).

You may not qualify if…

• Immunocompromised individuals associated with known or suspected immunodeficiency, as determined by history and/or laboratory/physical examination.
• Individuals with a history of autoimmune disease or an active autoimmune disease requiring therapeutic intervention, including but not limited to systemic lupus erythematosus. Note: Stable type 1 diabetes and hypothyroidism are permitted.
• Other medical or psychiatric condition including recent (within the past year) or active suicidal ideation/behavior or laboratory abnormality that may increase the risk of study participation or, in the investigator's judgment, make the participant inappropriate for the study.
• History of severe adverse reaction associated with a vaccine and/or severe allergic reaction (eg, anaphylaxis) to any component of the study intervention(s).
• Bleeding diathesis or condition associated with prolonged bleeding that would, in the opinion of the investigator, contraindicate intramuscular injection.
• Individuals with a history of epilepsy or other seizure disorders, or a history of seizures and/or other neurological complications following vaccination.
• Previous vaccination with any licensed or investigational RSV vaccine or planned receipt during study participation. Children who may have been exposed to investigational RSV vaccines through maternal immunization will be permitted.
• Receipt of investigational or approved monoclonal antibodies against RSV within 6 months before study intervention administration, or planned receipt throughout the study.
• Receipt of blood/plasma products or immunoglobulins within 28 days before study intervention administration, or planned receipt throughout the study.
• Receipt of chronic systemic treatment with known immunosuppressant medications (including cytotoxic agents or systemic corticosteroids), or radiotherapy, within 60 days before study intervention administration, or planned receipt throughout the study.
• Note: Systemic corticosteroids are defined as those administered for ≥14 days at a dose of ≥20 mg/day of prednisone or equivalent (eg, for cancer or an autoimmune disease). Inhaled/nebulized, intra-articular, intrabursal, or topical (skin, eyes, or ears) corticosteroids are permitted.
• Participation in other studies involving study intervention within 28 days prior to study entry and/or for the duration of study participation.
• Investigator site staff directly involved in the conduct of the study and their family members, site staff otherwise supervised by the investigator, and sponsor and sponsor delegate employees directly involved in the conduct of the study and their family members.

Where it is running

• University of Alabama at Birmingham - School of Medicine — Birmingham, Alabama, United States
• Stanford University Medical Center — Palo Alto, California, United States
• Peninsula Research Associates — Rolling Hills Estates, California, United States
• Bio-Medical Research LLC — Miami, Florida, United States
• Velocity Clinical Research, Sioux City — Sioux City, Iowa, United States
• Velocity Clinical Research, New Orleans — Metairie, Louisiana, United States
• Velocity Clinical Research, Omaha — Omaha, Nebraska, United States
• Rochester Clinical Research, LLC — Rochester, New York, United States
• Duke Vaccine And Trials Unit — Durham, North Carolina, United States
• Cincinnati Children's Hospital Medical Center — Cincinnati, Ohio, United States
• Senders Pediatrics — South Euclid, Ohio, United States
• Velocity Clinical Research, Providence — East Greenwich, Rhode Island, United States
• Innovo Research - Austin Regional Clinic — Austin, Texas, United States
• Velocity Clinical Research, Austin — Austin, Texas, United States
• Velocity Clinical Research, Salt Lake City — West Jordan, Utah, United States
• Seattle Children's - Building Cure — Seattle, Washington, United States
• Seattle Children's Hospital — Seattle, Washington, United States

Full record on ClinicalTrials.gov

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