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COVID-19 VaccinesPhase 1NCT05226390

Safety, Reactogenicity and Immunogenicity of a Novel MVA-SARS-2-ST Vaccine Candidate

A Phase 1 study testing MVA-SARS-2-ST in people with COVID-19 Vaccines, run by Hannover Medical School at 1 site in Germany.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Official record
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Trial summary

This will be a phase I, single-center trial, including a total of 30 participants in two cohorts. Cohort 1 (n=6): Healthy male or female adults aged 18 - ≤ 60 previously primary immunized with two vaccinations with any regimen using any EU marketed SARS-CoV-2 vaccine (mRNA-, vector-, protein-based, attenuated… Read more about this study

Who is it for?
Ages 18 to 60 yearsHealthy volunteers can take part
Conditions the study is for
COVID-19 Vaccines
What is being tested?
MVA-SARS-2-ST
Could I receive a placebo?
No, everyone receives an active treatment
How many people
23 participants
Where
1 siteGermany
Study dates
24 Feb 2022to 17 Nov 2023
Phase
Phase 1
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 60 years
  • All sexes
  • Healthy volunteers accepted
  • Adult

Who may be able to join

  • The subject must not be enrolled before all inclusion criteria (including test results) are confirmed. Subjects meeting all of the criteria listed below will be included in the study.
  • Signed written informed consent from subject prior to any study-related procedure and willingness to comply with treatment and follow-up procedures
  • Healthy men or women, aged ≥ 18 ≤ 60 at day of inclusion having received either
  • primary immunization (cohort 1) with any regimen using any EU marketed SARS- CoV-2 vaccine or
  • subsequently booster immunization (cohort 2) with any EU marketed mRNA vaccine
  • at least 3 months prior to enrollment
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  • Adults with SARS-CoV-2 specific IgG concentration between 10 RU/ml and 1200 RU/ml determined by Anti-SARS-CoV-2-QuantiVac-ELISA (IgG)
  • Males or non-pregnant, non-lactating females of child-bearing potential with negative pregnancy test at screening who agree to comply with the applicable contraceptive requirements of the protocol (Section 3.4) from at least 14 days prior to vaccination and during the entire duration of the study.
  • or
  • Females without child-bearing potential defined as follows:
  • at least 6 weeks after surgical sterilization by bilateral tubal ligation or bilateral oophorectomy or
  • hysterectomy or uterine agenesis or
  • ≥ 50 years and in postmenopausal state > 1 year or
  • < 50 years and in postmenopausal state > 1 year with serum FSH > 40 IU/l and serum estrogen < 30 ng/l or a negative estrogen test, both at screening
  • Normal pulmonary function: FEV1 predicted ≥ 80% and FEV1/FVC > 70%
  • Body mass index 18.5 - 30.0 kg/m2 and weight > 50 kg at screening
  • Subject is capable of understanding the investigational nature, potential risks and benefits of the clinical trial

Who cannot join

  • Subjects are excluded from the study if any of the following criteria are met at screening or on dosing day.
  • Previous MVA or rMVA vaccination
  • Known allergy to the components of the SARS-CoV-2 vaccine product as chicken proteins or history of life-threatening reactions to vaccine containing the same substances
  • Known history of anaphylaxis to vaccination or any allergy likely to be exacerbated by any component of the trial vaccine
  • Any laboratory value outside the reference range that the investigator considers to be of clinical relevance; safety laboratory screening evaluation can be repeated a maximum of two times
  • Any finding in the medical history and physical examination deviating from normal and assessed as clinically relevant by the investigator
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  • Evidence in the subject's medical history or in the medical examination that might influence the absorption, distribution, metabolism or excretion of the investigational medicinal product
  • Current smoking/ vaping or smoking /vaping in the previous year.
  • Clinically relevant findings in ECG
  • Any confirmed or suspected immunosuppressive or immunodeficient condition, cytotoxic therapy in the previous 5 years, and/or diabetes
  • Asthma, chronic obstructive pulmonary disease or other lung disease
  • Respiratory tract infection in the 4 weeks prior to study treatment
  • Any chronic or active neurologic disorder, including seizures, and epilepsy, excluding a single febrile seizure as a child
  • Known intolerance to medication used during bronchoscopy, i.e. midazolam and lidocaine.
  • Treatment with ß-adrenoceptor antagonists
  • Alcohol abuse (consumption of more than 20 g per day for females and 30 g per day for males)
  • Drug abuse or positive drug screening
  • Any positive result for HIV1/2, HCV antibody or HBs antigen testing
  • Moderate or severe illness and/or fever >38 °C within 1 week prior to vaccination
  • History of blood donation within 60 days of enrollment or plans to donate within the treatment phase
  • Participation in a clinical trial or use of an investigational product within 30 days or five times the half-life of the investigational product -whichever is longer- prior to receiving the first dose within this study
  • Investigator or employee of the study site or Sponsor with direct involvement in the proposed study, or identified as an immediate family member (i.e., parent, natural or adopted child) of the investigator or employee with direct involvement in the proposed study

Trial locations and contacts

1 site in 1 country.

Germany1 site
  • Hannover Medical School ZKS - Early Clinical Trial Unit at CRC Hannover

    Hanover, 30625

Other trials in Germany

About this study

Official title: Safety, Reactogenicity and Immunogenicity of a Novel MVA-SARS-2-ST Vaccine Candidate Administered as Inhalation Boost in SARS-CoV-2 Immunized Adults - Phase I Study

This will be a phase I, single-center trial, including a total of 30 participants in two cohorts.

Cohort 1 (n=6): Healthy male or female adults aged 18 - ≤ 60 previously primary immunized with two vaccinations with any regimen using any EU marketed SARS-CoV-2 vaccine (mRNA-, vector-, protein-based, attenuated SARS-CoV-2 virus) or with a single application of COVID-19 Vaccine Janssen.

Read more

Cohort 2 (n=24): Healthy male or female adults aged 18 - ≤ 60 primary immunized with two vaccinations with any regimen using any EU marketed SARS-CoV-2 vaccine (mRNA-, vector-, protein-based, attenuated SARS-CoV-2 virus) or with a single application of COVID-19 Vaccine Janssen and subsequently booster immunized with any EU marketed mRNA vaccine

Both cohorts will be assigned to inhaled vaccination with MVA-SARS-2-ST

Being tested
MVA-SARS-2-ST
Keywords
MVA-SARS-COV-2, MVA-SARS-2-ST

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • MVA-SARS-2-STBiological

    In this trial MVA-SARS-2-ST will be used. Each vial contains 1 x 107 IU/dose MVA-SARS-2-ST in 0.5 mL as active ingredient. The solution will be used for nebulization and direct administration to the respiratory tract.

Study groups in NCT05226390
Study groupRoleWhat they receive
1 x 107 IU/dose MVA-SARS-2-STExperimentalAll Participants will receive a single booster dose of 1 x 107 IU MVA-SARS-2-ST in 0.5 mL as inhalation (total inhaled volume 0.5 mL)
Receives: Biological: MVA-SARS-2-ST

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. The nature, frequency and severity of adverse events associated with MVA-SARS-2-ST

    Occurrence of solicited local reactogenicity signs and symptoms

    Measured: day 0

  2. The nature, frequency and severity of adverse events associated with MVA-SARS-2-ST

    Occurrence of solicited local reactogenicity signs and symptoms

    Measured: day 1

  3. The nature, frequency and severity of adverse events associated with MVA-SARS-2-ST

    Occurrence of solicited local reactogenicity signs and symptoms

    Measured: day 2

  4. The nature, frequency and severity of adverse events associated with MVA-SARS-2-ST

    Occurrence of solicited local reactogenicity signs and symptoms

    Measured: day 3

  5. The nature, frequency and severity of adverse events associated with MVA-SARS-2-ST

    Occurrence of solicited local reactogenicity signs and symptoms

    Measured: day 4

  6. The nature, frequency and severity of adverse events associated with MVA-SARS-2-ST

    Occurrence of solicited local reactogenicity signs and symptoms

    Measured: day 5

  7. The nature, frequency and severity of adverse events associated with MVA-SARS-2-ST

    Occurrence of solicited local reactogenicity signs and symptoms

    Measured: day 6

  8. The nature, frequency and severity of adverse events associated with MVA-SARS-2-ST

    Occurrence of solicited local reactogenicity signs and symptoms

    Measured: day 7

  9. Change from baseline of pulmonary function associated with MVA-SARS-2-ST

    Change from baseline of pulmonary function measured by spirometry as forced vital capacity (FVC) (%)

    Measured: day 0 (2h), day 1, 3, 7, 14, 28, 56, 140

  10. Change from baseline of pulmonary function associated with MVA-SARS-2-ST

    Change from baseline of pulmonary function measured by spirometry as forced expiratory volume in 1 second (FEV1) (%)

    Measured: day 0 (2h), day 1, 3, 7, 14, 28, 56, 140

  11. Change from baseline of pulmonary function associated with MVA-SARS-2-ST

    Change from baseline of pulmonary function measured by spirometry as FEV1/FVC (%)

    Measured: day 0 (2h), day 1, 3, 7, 14, 28, 56, 140

  12. Change from baseline of pulmonary function associated with MVA-SARS-2-ST

    Change from baseline of pulmonary function measured by peak flow as peak expiratory flow (PEF) frequently

    Measured: day 0 and twice daily on days 1, 2, 3, 4, 5, 6, 7

  13. Occurrence of solicited systemic reactogenicity signs and symptoms associated with MVA-SARS-2-ST

    Occurrence of solicited systemic reactogenicity signs and symptoms vaccination

    Measured: day 0

  14. Occurrence of solicited systemic reactogenicity signs and symptoms associated with MVA-SARS-2-ST

    Occurrence of solicited systemic reactogenicity signs and symptoms vaccination

    Measured: day 1

  15. Occurrence of solicited systemic reactogenicity signs and symptoms associated with MVA-SARS-2-ST

    Occurrence of solicited systemic reactogenicity signs and symptoms vaccination

    Measured: day 2

  16. Occurrence of solicited systemic reactogenicity signs and symptoms associated with MVA-SARS-2-ST

    Occurrence of solicited systemic reactogenicity signs and symptoms vaccination

    Measured: day 3

  17. Occurrence of solicited systemic reactogenicity signs and symptoms associated with MVA-SARS-2-ST

    Occurrence of solicited systemic reactogenicity signs and symptoms vaccination

    Measured: day 4

  18. Occurrence of solicited systemic reactogenicity signs and symptoms associated with MVA-SARS-2-ST

    Occurrence of solicited systemic reactogenicity signs and symptoms vaccination

    Measured: day 5

  19. Occurrence of solicited systemic reactogenicity signs and symptoms associated with MVA-SARS-2-ST

    Occurrence of solicited systemic reactogenicity signs and symptoms vaccination

    Measured: day 6

  20. Occurrence of solicited systemic reactogenicity signs and symptoms associated with MVA-SARS-2-ST

    Occurrence of solicited systemic reactogenicity signs and symptoms vaccination

    Measured: day 7

  21. Occurrence of unsolicited adverse events (AE) associated with MVA-SARS-2-ST

    Occurrence of unsolicited adverse events (AE)

    Measured: from day 0 to day 28 after vaccination

  22. Change of safety laboratory measures associated with MVA-SARS-2-S

    Change from baseline of safety laboratory measures

    Measured: day 1, 3, 7, 14, 28, 56, 140

  23. Occurrence of serious adverse events (SAE) associated with MVA-SARS-2-ST

    Occurrence of serious adverse events (SAE)

    Measured: through study completion, an average of 5 month

Secondary outcomes (2)
  1. To evaluate immunogenicity of the candidate MVA-SARS-2-ST

    Change from baseline of levels of binding antibodies against SARS-CoV-2 spike S1 protein measured by ELISA in blood

    Measured: day 7, 14, 28, 56 and 140

  2. To evaluate immunogenicity of the candidate MVA-SARS-2-ST

    Change from baseline of levels of binding antibodies against SARS-CoV-2 spike S1 protein measured by ELISA in (bronchial alveolar lavage) BAL on day 14

    Measured: day 14

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted7 Feb 2022
  2. Study start24 Feb 2022
  3. Primary completion17 Nov 2023
  4. Study completion17 Nov 2023

Why it stopped: cohort could not be recruited

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1
Primary purpose
Prevention
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
23 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05226390
Sponsor's protocol ID
MVA-S2-S-R01
Status last verified
Jan 2024
First submitted
31 Jan 2022
Last updated
21 Aug 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing MVA-SARS-2-ST in people with COVID-19 Vaccines, run by Hannover Medical School at 1 site in Germany.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 17 inclusion and 22 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: stopped early, as of the sponsor's last update on 21 Aug 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Germany. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

The study was stopped early (reason given: cohort could not be recruited). Results are not available in the source record.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

The nature, frequency and severity of adverse events associated with MVA-SARS-2-ST (time frame: day 0). The study lists 23 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 21 Aug 2026.

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