Phase 3
N=3,689
VELOCITY: An Anthrax Vaccine Clinical Study
Anthrax
Bottom Line
View on ClinicalTrials.gov: NCT03877926 ↗Enrolled (actual)
3,689
Serious AEs
1.7%
Results posted
Dec 2021
Primary outcome: Primary: Geometric Mean Titer (GMT) of Toxin Neutralizing Antibody (TNA) 50% Neutralization Factor (NF50) at Day 64 — 0.765; 0.741; 0.716; 0.330 Titer (TNA NF50)
Study Design & Population
- Study type
- Interventional
- Phase
- Phase 3
- Interventions
- AV7909 (Biological); BioThrax (Biological)
- Age
- Adult, Older Adult · 18+ yrs
- Sex
- All
- Sponsor
- Emergent BioSolutions
- Primary completion
- Aug 2020
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Geometric Mean Titer (GMT) of Toxin Neutralizing Antibody (TNA) 50% Neutralization Factor (NF50) at Day 64 |
0.765; 0.741; 0.716; 0.330 | — |
| PRIMARY Percentage of Participants in AV7909 Lot 1, Lot 2 and Lot 3 Groups Achieving a TNA NF50 ≥0.56 on Day 64 |
68.9; 65.6; 64.4 | — |
| PRIMARY Percentage of AV7909 Participants Achieving a TNA NF50 ≥0.56 on Day 64 |
66.3 | — |
| PRIMARY Percentage of AV7909 Participants and BioThrax Participants With TNA NF50 ≥0.29 at Day 64 |
87.4; 86.8; 85.7; 61.4 | — |
| PRIMARY Incidence of Serious Adverse Events |
21; 16; 21; 4 | — |
| SECONDARY Percentage of AV7909 Participants Achieving a TNA NF50 ≥0.15 on Day 29. |
98.3; 97.8; 97.4 | — |
| SECONDARY Incidence of Adverse Events |
310; 315; 336; 221 | — |
| SECONDARY Incidence of Adverse Events of Special Interest (Events of Autoimmune Etiology) |
5; 4; 6; 2 | — |
| SECONDARY Incidence of Solicited Systemic Reactogenicity Events |
885; 876; 864; 414 | — |
| SECONDARY Incidences of Solicited Injection Site Reactogenicity Events |
961; 961; 967; 500 | — |
Summary
This study is designed to evaluate the lot consistency (using three consecutively manufactured lots), safety, and ability of the AV7909 anthrax vaccine to generate an immune response in healthy adults and compare the response to that induced by the currently licensed vaccine, BioThrax®, (Anthrax Vaccine Adsorbed; AVA) for post-exposure of anthrax disease.
Eligibility Criteria
Inclusion Criteria
- Written informed consent obtained from the participant (dated and signed).
- Healthy condition as established by medical history and clinical examination before entering into the study.
- A male or female aged 18 to 65 years, inclusive, at the time of informed consent.
- Body mass index (BMI) ≤35.0 kg/m^2 at Screening visit.
- Have adequate venous access for phlebotomies.
- For a woman of childbearing potential (WOCBP), negative serum pregnancy test at Screening and negative urine pregnancy test prevaccination on Day 1, not currently breastfeeding, and no intention to become pregnant during the study through Month 13. Every female participant is considered to be a WOCBP unless surgically sterile (bilateral oophorectomy or bilateral salpingectomy or hysterectomy) OR postmenopausal (defined as >12 consecutive months without menses and screening follicle-stimulating hormone >30 mIU/mL). Women who are not of childbearing potential are allowed to enroll if they are surgically sterile or postmenopausal as defined above.
Exclusion Criteria
- Use of any investigational or nonregistered product (drug, vaccine, device, or combination product) within 30 days preceding the dose of study vaccine, or planned use during the study through Month 13.
- Positive test result on urine drug screen, any evidence of ongoing drug abuse or dependence (including alcohol), or recent history (over the past five years) of treatment for alcohol or drug abuse.
- Chronic administration (defined as >14 days) of immunosuppressants or other immune-modifying drugs (includes oral or parenteral corticosteroids, for example, a glucocorticoid dose exceeding 10 mg/day prednisone or equivalent) within six months prior to the vaccine dose; inhalation use (for example, for seasonal allergies) is permitted.
- Planned administration of any commercially-available vaccine from seven days prior to the first study vaccination through two weeks after the last vaccination.
- Previous anaphylactic reaction, severe systemic response, or serious hypersensitivity to a prior immunization or a known allergy to synthetic Oligodeoxynucleotides, aluminum, formaldehyde, benzethonium chloride (phemerol), or latex.
- History of anthrax disease, suspected exposure to anthrax, or previous vaccination with any anthrax vaccine.
- Have a tattoo/scar/birthmark or any other skin condition affecting the deltoid area that may interfere with injection site assessments.
- A positive blood test for hepatitis B surface antigen, hepatitis C antibody, or human immunodeficiency virus (HIV) HIV-1 or HIV-2 antibodies.
- Any confirmed or suspected immunodeficiency condition (congenital or secondary) or autoimmune disease based on medical history and Physical Exam, for example, Guillain-Barré.
- A family history of congenital or hereditary immunodeficiency.
- Major congenital defects or serious chronic illness, including any cancer other than the following: a) any non-metastatic cancer (excluding hematologic malignancies) or melanoma of which the participant has been disease-free for at least five years and b) localized skin cancer, resected (including squamous cell and basal cell carcinomas).
- Acute disease at the time of enrollment. Note that screening lab tests may be delayed to allow the resolution of a transient acute condition or the subject may be rescreened.
- Any medical condition that, in the opinion of the investigator, could adversely impact the participant's participation or the conduct of the study.
- Any planned elective surgery during the study through 12 months after the last vaccination.
- Planned receipt of immunoglobulins and/or any blood products within the three months preceding study enrollment or at any point during the study period until after the final safety phone contact.
- Woman of childbearing potential refusing to practice an adequate method of contraception from at least one month before Day 1 and continuing through Month 1
Data sourced from ClinicalTrials.gov (NCT03877926). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication.