ClinicalTrials.gg
Status unknownNCT03051386VEEUpdated Feb 11, 2021

Safety and Immunogenicity of Venezuelan Equine Encephalomyelitis Vaccine in Healthy Adults

A Phase 2 interventional study of VEE Vaccine in Venezuelan Equine Encephalomyelitis Virus Disease, sponsored by U.S. Army Medical Research and Development Command. Status unknown at 1 site in United States. Open to participants aged 18 Years to 65 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-02-11.

Sponsored by U.S. Army Medical Research and Development Command · Phase 2, Interventional, and Prevention

The sponsor has not verified this record recently (last verified Feb 2021), so the status shown — last known as Active, not recruiting — may be out of date.
Phase
Phase 2
Study type
Interventional
Enrollment
500
Allocation
Not applicable
Ages
18 Years to 65 Years
Sex
All
01

Study summary

The purpose of this study is to evaluate the safety and immunogenicity of VEE vaccine, Live, Attenuated, dried TC-83, NDBR 102, Lot 4, Run 3, and collect data on the incidence of occupational VEE virus infection in vaccinated personnel.

Read the detailed description

This protocol is replacing NCT00582504.

The study population will consist of USAMRIID and qualified extramural participants who are at risk of exposure to VEE virus. This study will be performed at the USAMRIID SIP Clinic. This open-label study represents a continuation of previous research conducted at USAMRIID. Subjects will be vaccinated with 0.5 mL of VEE vaccine, Live, Attenuated TC-83, NDBR 102, Lot 4, Run 3 subcutaneously in the upper outer aspect of the triceps region. Subjects will contacted the following day and weekly for 4 weeks to assess for adverse events.

02

Conditions studied

  • Venezuelan Equine Encephalomyelitis Virus Disease

Browse trials for

03

In context

Encephalomyelitis

6 studies on the registry are indexed under Encephalomyelitis; 2 are open to participants now.

Browse Encephalomyelitis studies →

Lead sponsor

U.S. Army Medical Research and Development Command is the lead sponsor of 153 studies on the registry; 8 are open to participants now.

Of its 23 completed or terminated interventional studies of FDA-regulated products, 16 (70%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Be 18-65 years old at time of consent.
  2. Have VEE virus PRNT80 \< 1:10.
  3. If female of , must agree to have a serum pregnancy test on the same day before vaccine administration. (Exception: documented hysterectomy or ≥ 3 years of menopause.) The results must be negative. Females must agree not to become pregnant for 3 months after receipt of the vaccination.
  4. Be considered at risk for exposure to VEE virus and who have submitted a Request for IND Vaccines for the VEE vaccine.
  5. Sign and date the approved document and HIPAA Authorization.
  6. Have in their charts:

    • medical history (including concomitant medications) within 60 days of planned first administration of vaccine
    • physical examination and laboratory tests within 1 year
    • previous chest radiograph results and
  7. Be medically cleared for participation by an investigator. Examinations or tests may be repeated at the discretion of the PI.
  8. Be willing to return for all follow-up visits.
  9. Agree to report any AEs that may or may not be associated with administration of the vaccine for at least 28 days after administration and agree to report all SAEs (for example, resulting in hospitalization) for the duration of the subject's participation in the study.
  10. Agree to defer blood donation for 1 year after receipt of the vaccine.

Exclusion criteria

Exclusion Criteria:

  1. Have received VEE vaccine.
  2. Have family history (first degree relative) of diabetes mellitus (any type), a personal or family history of gestational diabetes, a confirmed elevated fasting serum glucose test (> 125 mg/dL), or a > 5.6%. (At the principal investigator's discretion, a subject may participate if the family history of diabetes is only of late onset in an elderly parent.)
  3. Have abnormal laboratory results (including evidence of , carrier state) or elevated liver function tests (two times the normal range or at the discretion of the PI).
  4. Have a personal history of an immunodeficiency or received treatment with an medication, such as systemically administered (eg prednisone) within 1 month before planned administration of the vaccine or with other immunosuppressive therapies within 6 months of planned administration of the vaccine. Other immunosuppressive therapies include all cancer chemotherapeutic agents, drugs to prevent transplant rejection, interferons, monoclonal antibodies, protein kinase inhibitors, methotrexate, TNF (tumor necrosis factor) inhibitors, and any other drug determined to be immunosuppressive by the PI. Current administration of topical, inhalational, or intranasal glucocorticoids is not excluded.
  5. Have confirmed infection (antibody positivity).
  6. Have a positive pregnancy test or a breastfeeding female.
  7. Have any known allergies to components of the vaccine:

    • Neomycin sulfate
    • Guinea pig heart cells
    • Streptomycin
    • Human serum albumin
  8. History of serious allergic reaction to guinea pigs or guinea pig products. (Subjects who have known allergies to guinea pigs will be evaluated. The vast majority of individuals who are allergic to guinea pigs are allergic to the dander from the animals. An individual with a past serious allergic reaction to guinea pigs will be excluded.)
  9. Have administration of another vaccine or product within 28 days of VEE vaccination.
  10. Have any unresolved AE resulting from a previous immunization.
  11. Have a medical condition that, in the judgment of the PI, would impact subject safety.
Terms in these criteria, in plain language(11)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

ECG (electrocardiogram)

A recording of the heart’s electrical activity, taken with stickers on the chest, arms and legs. It takes a few minutes and does not hurt.

HbA1c

A blood test of average blood sugar over the past two to three months, given as a percentage or in mmol/mol. 6.5% (48 mmol/mol) or more is the usual threshold for diabetes, normally confirmed by a second test.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

Phase
Phase 2
Primary purpose
Prevention
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
500 participants (estimated)

Study arms

  • Experimental
    VEE Vaccine

    0.5 mL of VEE vaccine, Live, Attenuated TC-83, NDBR 102, Lot 4, Run 3

    Biological: VEE Vaccine

Interventions

  • BiologicalVEE Vaccine

    0.5 mL of VEE vaccine administered subcutaneously in the upper outer aspect of the triceps region.

    Also known as: TC-83

06

What researchers measure

Primary outcomes

  1. Safety: Occurrence of Serious Adverse Events and Adverse Events (SAEs and AEs)

    Collect and assess safety data for VEE vaccine

    Time frame: 15 months

  2. Safety: Percentage of subjects with symptoms following VEE vaccination

    Collect and assess safety data for VEE vaccine

    Time frame: 15 months

  3. Safety: Percentage of subjects with each AE, system organ class of AE, severity, and association with vaccination

    Collect and assess safety data for VEE vaccine

    Time frame: 15 months

Secondary outcomes

  1. Immunogenicity: Percentage of subjects who develop titers of >1:20

    Percentage of subjects who develop titers of ≥ 1:20 as determined by PRNT80 after VEE vaccination at each scheduled time point for which blood samples are taken and over the entire study period to study completion.

    Time frame: 15 months

  2. Immunogenicity: Geometric Mean PRNT80 Titers of subjects

    Geometric mean PRNT80 titers of subjects at each scheduled time point for which blood samples are taken and over the entire study period to study completion.

    Time frame: 15 months

07

Study locations

1 site
  • Special Immunizations Program, Division of Medicine, USAMRIID
    Fort Deterick, Maryland 21702, United States
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Started May 2018 (actual). Primary completion is estimated for Apr 2022, 46 months after the start.

How these figures are worked out, and which studies are left out of them.

Registered
Feb 9, 2017
First posted
Feb 13, 2017
StartActual
May 30, 2018
Primary completionEst.
Apr 1, 2022
CompletionEst.
Apr 1, 2023
Last update
Feb 11, 2021
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Feb 11, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03051386
Collaborators
US Army Medical Research Institute of Infectious Diseases
Responsible party
Sponsor
First posted
Feb 13, 2017
Start date
May 30, 2018
Primary completion
Apr 1, 2022 (estimated)
Completion
Apr 1, 2023 (estimated)
Last update
Feb 11, 2021

Study contacts

Ronald B. Reisler, MD, MPH
principal investigator · USAMRIID

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is status unknown, as verified in Feb 2021. You cannot join it, but the record below documents what was studied.

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