ClinicalTrials.gg
CompletedNCT00189956Updated Jan 10, 2019

Dose-finding Study to Evaluate Immunogenicity of Three Different Dose Levels of the IMVAMUNE (MVA-BN) Smallpox Vaccine.

A Phase 2 interventional study of IMVAMUNE (MVA-BN) in Smallpox, sponsored by Bavarian Nordic. Completed at 1 site in Switzerland. Open to participants aged 18 Years to 30 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2019-01-10.

Sponsored by Bavarian Nordic · Phase 2, Interventional, and Prevention

Phase
Phase 2
Study type
Interventional
Enrollment
165
Allocation
Randomized
Ages
18 Years to 30 Years
Sex
All
01

Study summary

The objective of the study is to find the optimal dose for the smallpox candidate vaccine IMVAMUNE (MVA-BN). For this purpose the study compares IMVAMUNE (MVA-BN) administered at three different dose levels.

02

Conditions studied

  • Smallpox

Browse trials for

03

In context

Smallpox

73 studies on the registry are indexed under Smallpox; 5 are open to participants now.

This study's enrollment of 165 is close to the median of 150 across 61 interventional studies indexed under Smallpox.

Browse Smallpox studies →

Lead sponsor

Bavarian Nordic is the lead sponsor of 58 studies on the registry; 2 are open to participants now.

Of its 16 completed or terminated interventional studies of FDA-regulated products, 12 (75%) have results posted.

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

04

Who can participate

Ages eligible
18 Years to 30 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

  • Healthy male and female subjects, aged 18 - 30 years
  • Signed after being advised of the risks and benefits of the study in a language able to understand, and prior to performance of any study specific procedure.
  • Free of obvious health problems with acceptable medical history by screening evaluation and physical examination.
  • Subject of not of or all of the following: A urine/serum ß-HCG pregnancy test gives a negative result, use of adequate precautions for 30 days before first vaccination.

Exclusion criteria

Exclusion Criteria:

  • Known or suspected history of smallpox vaccination or typical vaccinia scar.
  • Positive test result in MVA specific ELISA or PRNT at screening.
  • Positive result in or antibody test at screening.
  • HbsAG positive at screening.
  • Pregnancy or breast-feeding.
  • Uncontrolled serious infection i.e. not responding to antimicrobial therapy
  • History of any serious medical condition, which in the opinion of the investigator, would compromise the safety of the subject.
  • History of disease
  • History of .
  • History of chronic alcohol abuse and/or intravenous drug abuse.
  • History of allergic disease or reactions likely to be exacerbated by any component of the vaccine.
  • History of anaphylaxis or severe allergic reaction.
  • Acute disease (a moderate or severe illness with or without a fever) at the time of enrolment.
  • Any vaccinations within a period starting 30 days prior to administration of the vaccine and ending at study conclusion.
  • Chronic administration of immuno-suppressants or other immune-modifying drugs.
  • Administration or planned administration of immunoglobulins and/or any blood products during the study period.
  • Use of any or non-registered drug or vaccine.
Terms in these criteria, in plain language(8)

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.

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.

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.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

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.

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.

Autoimmune disease

A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.

Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

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
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
165 participants (actual)

Study arms

  • Active comparator
    Group 1

    healthy, vaccinia naïve subjects 2 x 10E7 TCID50 IMVAMUNE (MVA-BN), subcutaneous

    Biological: IMVAMUNE (MVA-BN)

  • Active comparator
    Group 2

    healthy, vaccinia naïve subjects 5 x 10E7 TCID50 IMVAMUNE (MVA-BN), subcutaneous

    Biological: IMVAMUNE (MVA-BN)

  • Active comparator
    Group 3

    healthy, vaccinia naïve subjects 1 x 10E8 TCID50 IMVAMUNE (MVA-BN), subcutaneous

    Biological: IMVAMUNE (MVA-BN)

Interventions

  • Two vaccinations of 0.5 ml MVA-BN vaccine, separated by a 4 week interval.

06

What researchers measure

Primary outcomes

  1. ELISA seroconversion rate

    Seroconversion rate based on vaccinia-specific Enzyme-linked Immunosorbent Assay (ELISA). Seroconversion is defined as the appearance of antibody titers ≥ detection limit for initially seronegative subjects, or a doubling or more of the antibody titer compared to Baseline titer for initially seropositive subjects. Percentages based on number of subjects with data available.

    Time frame: Day 42

Secondary outcomes

  1. ELISA seroconversion rate

    Seroconversion rate based on vaccinia-specific Enzyme-linked Immunosorbent Assay (ELISA). Seroconversion is defined as the appearance of antibody titers ≥ detection limit for initially seronegative subjects, or a doubling or more of the antibody titer compared to Baseline titer for initially seropositive subjects. Percentages based on number of subjects with data available.

    Time frame: Days 28, 84

  2. ELISA GMT

    Geometric Mean Titers (GMT) based on vaccinia-specific Enzyme-linked Immunosorbent Assay (ELISA). Titers below the detection limit are included with a value of '1'.

    Time frame: Days 28, 42, 84

  3. PRNT seroconversion rate

    Seroconversion rate based on vaccinia-specific Plaque Reduction Neutralization Test (PRNT). Seroconversion is defined as the appearance of antibody titers ≥ detection limit for initially seronegative subjects, or a doubling or more of the antibody titer compared to Baseline titer for initially seropositive subjects. Percentages based on number of subjects with data available.

    Time frame: Days 28, 42, 84

  4. PRNT GMT

    Geometric Mean Titers (GMT) based on vaccinia-specific Plaque Reduction Neutralization Test (PRNT). Titers below the detection limit are included with a value of '1'.

    Time frame: Days 28, 42, 84

  5. Cytotoxic T-Lymphocyte response

    The Cytotoxic T-Lymphocyte (CTL) response was determined by measuring IFNγ producing cells by Intracellular cytokine staining (ICS)

    Time frame: Days 28, 42, 84

  6. Serious Adverse Events

    Incidence, relationship and intensity of any Serious Adverse Event (SAE)

    Time frame: within 12 weeks

  7. Solicited Local Adverse Events

    Incidence and intensity of solicited local AEs. Percentages based on subjects with at least one completed diary card.

    Time frame: within 8 days after any vaccination

  8. Solicited General Adverse Events

    Incidence of solicited general AEs: Intensity and relationship to vaccination. Percentages based on subjects with at least one completed diary card.

    Time frame: within 8 days after any vaccination

  9. Unsolicited Non-serious Adverse Events

    Occurrence of unsolicited non-serious AEs: Intensity and relationship to vaccination

    Time frame: within 31 days after any vaccination

07

Study locations

1 site
  • Swiss Pharma Contract
    Basel, 4123, Switzerland
08

References and documents

Publications

  • von Krempelhuber A, Vollmar J, Pokorny R, Rapp P, Wulff N, Petzold B, Handley A, Mateo L, Siersbol H, Kollaritsch H, Chaplin P. A randomized, double-blind, dose-finding Phase II study to evaluate immunogenicity and safety of the third generation smallpox vaccine candidate IMVAMUNE. Vaccine. 2010 Feb 3;28(5):1209-16. doi: 10.1016/j.vaccine.2009.11.030. Epub 2009 Nov 25. PubMed 19944151 ↗

Individual participant data

Plan to share: No

09

Timeline

Tracking since Sep 25, 2026
Not marked actual or estimatedDates not marked actual or estimated

The record gives a start of Apr 2003, a primary completion of Nov 2003 and a completion of Dec 2005. It does not say whether these dates are actual or estimated.

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

Registered
Sep 11, 2005
First posted
Sep 19, 2005
Start
Apr 2003
Primary completionActual
Nov 2003
CompletionActual
Dec 2005
Last update
Jan 10, 2019
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 Jan 10, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT00189956
Lead sponsor
Bavarian Nordic
Responsible party
Sponsor
First posted
Sep 19, 2005
Start date
Apr 2003
Primary completion
Nov 2003
Completion
Dec 2005
Last update
Jan 10, 2019

Study contacts

Rolf Pokorny, M.D.
principal investigator · Swiss Pharma

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Dec 2018. You cannot join it, but the record below documents what was studied.

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Discussion

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Studies of the drug tested here: MVA-BN smallpox vaccine

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