A Study to Learn About the Safety, Tolerability, and Immunogenicity of a Fifth Dose of 6-Valent OspA-Based Lyme Disease Vaccine
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: VLA15, Placebo.
- Who it may be relevant to
- Registry conditions: Lyme Disease. Basic parameters: from 7 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- United States, Canada
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
Unsure about the terms? Read our patient guide →
Official title
A PHASE 3, RANDOMIZED, PLACEBO-CONTROLLED, DOUBLE-BLINDED STUDY TO EVALUATE THE SAFETY, TOLERABILITY, AND IMMUNOGENICITY OF A FIFTH DOSE OF 6-VALENT OSPA-BASED LYME DISEASE VACCINE, VLA15, IN HEALTHY PARTICIPANTS ≥7 YEARS OF AGE
Overview
The purpose of this study is to learn about the safety effects of the Lyme disease vaccine (called VLA15), and its ability to protect people from Lyme disease after a 5th dose of the vaccine. This study is seeking participants who: * are generally healthy and 7 years of age and older, * have already been vaccinated with 4 doses of VLA15 (from the VALOR study), and have blood sample taken post dose 4. * are not currently taking, or haven't recently taken, medicines like chemotherapy, blood products, or blood thinners. * are not pregnant or breastfeeding and do not plan to become pregnant while receiving the study vaccine. All participants in this study will receive a total of 1 dose through a shot in the upper arm, either VLA15 or saline shot (saltwater). The study will compare the experiences of people receiving the study vaccine or saltwater shot. Participants will take part in this study for about 12 months. During this time, they will have 4 planned clinic visits. The clinic visits may include having a health check, giving a small amount of blood and getting the study vaccine or saltwater as a shot at the first visit.
Detailed description
A Phase 3, Randomized, Placebo-Controlled, Double-Blinded Study to Evaluate the Safety, Tolerability, and Immunogenicity of a Fifth Dose of 6-Valent OspA-Based Lyme Disease Vaccine, VLA15, in Healthy Participants ≥7 Years of Age
Participants will be randomized in a 5:1 ratio to receive either one dose of VLA15 or placebo (saline) at the first visit. This study will use an external data monitoring committee (EDMC). The EDMC is independent of the Pfizer study team and includes only external members. The EDMC charter describes the role of the EDMC in more detail.
Approximately 1712 participants will be enrolled in the study.
Healthy individuals 7 years of age and older who have received 4 prior doses of active VLA15 from the C4601003 study, have a blood sample taken post dose 4, are willing to comply with all study procedures, and provide signed informed consent will be enrolled. Pregnant or breastfeeding individuals and fertile individuals who are unwilling or unable to use effective contraceptive methods as outlined in this protocol will not be enrolled. Individuals who have contraindication to vaccination, conditions or treatments that can inhibit the ability to mount an immune response to a vaccine, or other conditions that may increase the risk of study participation will be excluded from this study.
Interventions
- Biological VLA15
VLA15 injection IM - Biological Placebo
Saline Injection
Primary outcome measures
- Percentage of participants reporting prespecified local reactions [Time frame: Within 7 days following each study intervention administration]
- Percentage of participants reporting prespecified systemic events [Time frame: Within 7 days following each study intervention administration]
- Percentage of participants reporting adverse events (AEs) [Time frame: Through 1 month following study intervention administration]
- Percentage of participants reporting newly diagnosed chronic medical conditions (NDCMCs) [Time frame: Through study completion, up to approximately 12 months.]
- Percentage of participants reporting serious adverse events (SAEs) [Time frame: Through study completion, up to approximately 12 months.]
- Geometric mean ratio (GMR) of anti-OspA IgG concentrations for each serotype (ST1-ST6) [Time frame: At 1 month after completion of Dose 5]
- Sero-response of anti-OspA IgG concentrations for each serotype (ST1-ST6). [Time frame: At 1 month after completion of Dose 5]
Secondary outcome measures (9)
- Geometric mean ratio (GMR) of anti-OspA IgG concentrations for each serotype (ST1-ST6) [Time frame: At 1 month after completion of Dose 5]
- Geometric mean ratio (GMR) of anti-OspA IgG concentrations for each serotype (ST1-ST6) [Time frame: At 1 month after completion of Dose 5]
- Geometric mean ratio (GMR) of anti-OspA IgG concentrations for each serotype (ST1-ST6) [Time frame: At 1 month after completion of Dose 5]
- Geometric mean ratio (GMR) of anti-OspA IgG concentrations for each serotype (ST1-ST6) [Time frame: At 1 month after completion of Dose 5]
- Geometric mean fold rise (GMFR) of anti-OspA IgG concentrations for each serotype (ST1-ST6) [Time frame: At just prior to Dose 5 and 1 month after completion of Dose 5]
- Geometric mean concentration (GMC) of anti-OspA IgG concentrations for each serotype (ST1-ST6) [Time frame: At 1 month after completion of Dose 5]
- Sero-response of anti-OspA IgG concentrations for each serotype (ST1-ST6). [Time frame: At 1 month after completion of Dose 5]
- Sero-response of anti-OspA IgG concentrations for each serotype (ST1-ST6). [Time frame: At 1 month after completion of Dose 5]
- Sero-response of anti-OspA IgG concentrations for each serotype (ST1-ST6). [Time frame: At 1 month after completion of Dose 5]
Eligibility criteria
Inclusion criteria
- Participants who are healthy as determined by medical history and clinical judgment.
- Participants willing and able to comply with all scheduled visits, IP receipt, and other procedures throughout the study.
- Able to provide Informed Consent.
- Participants must have received 4 doses of VLA15 in the C4601003 study, and have a V7 blood sample available.
Exclusion criteria
- Pregnant or breastfeeding participants.
- Allergies or contraindications to vaccines or their components.
- Health issues including: blood clotting deficiencies, immunodeficiencies, bone marrow disorder, or uncontrolled psychiatric conditions.
- Receipt of therapies to treat malignancies, blood/plasma products and immunoglobulins, systemic corticosteroids and immunosuppressants, or anticoagulant therapy in recent medical history.
- Recent or concurrent participation in a separate interventional study.
- Staff or direct family of the study site staff and Sponsor.
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: Yes
Study design
- Allocation
- Randomized
- Model
- Parallel assignment
- Masking
- Triple blind
- Primary purpose
- Prevention
Study locations
United States · 19 centers
- Northern Light Eastern Maine Medical Center — Bangor
- Northern Light Family Medicine and Residency Center — Bangor
- University of Massachusetts Chan Medical School — Worcester
- Hunterdon Medical Center — Flemington
- Smith Allergy and Asthma Specialists — Cortland
- Smith Allergy & Asthma Specialists — Horseheads
- Altoona Center For Clinical Research — Duncansville
- Allegheny Health and Wellness Pavilion — Erie
- … and 11 more centers
Canada · 3 centers
- Milestone Research Inc. — London
- Stouffville Medical Research Institute Inc. — Stouffville
- Diex Recherche Inc. Division Sherbrooke — Sherbrooke
Identifiers
NCT: NCT07500506 · C4601016