Comparability Trial of the MVA-BN Vaccine Manufactured in Different Production Cells (NCT07199569) | Clinical Trial Compass
Active — Not RecruitingPhase 2
Comparability Trial of the MVA-BN Vaccine Manufactured in Different Production Cells
United States970 participantsStarted 2025-10-27
Plain-language summary
Randomized, double-blind, phase 2b trial to assess comparability in immunogenicity, safety, and reactogenicity of MVA-BN vaccine manufactured in primary chicken embryo fibroblast (CEF) cells and the CCX.E10 quail cell line in adults
Who can participate
Age range
18 Years – 49 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion criteria
. 18 to 49 years of age
. Informed consent form (ICF) signed and dated by the participant after reading the form and being advised of the risks and benefits of the trial in a language understood by the participant and before performance of any trial-specific procedures
. General good health, without clinically relevant medical illness, physical exam findings, or laboratory abnormalities, as determined by the investigator that would interfere with the trial
. Body mass index (BMI) ≥18.5 and ≤35 (calculated as \[body weight in kg\]/\[body height in m\]2 )
. Agreement by female participants of childbearing potential and male participants who are sexually active with a female partner of childbearing potential to use a highly effective method of birth control from at least 30 days prior to administration of the MVA-BN vaccine until 30 days after last vaccination
. Medically acceptable methods of contraception that may be used by the participant and/or partner include combined (estrogen- and progestogen-containing) hormonal contraception associated with inhibition of ovulation (oral, intravaginal, transdermal), progestogen-only hormonal contraception associated with inhibition of ovulation (oral, injectable, implantable), intrauterine device (IUD), intrauterine hormone-releasing system (IUS), combined use of 2 barrier birth control methods (male condom with female diaphragm, male condom with cervical cap), bilateral tubal occlusion, vasectomy, or abstinence (acceptable only if refraining from heterosexual intercourse during the entire period of 30 days prior to administration of the MVA-BN vaccine until 30 days after last vaccination
. Female participants or partners are not considered to be of childbearing potential if they are at least 1 year postmenopausal
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Immunogenicity of 2 doses of MVA-BN
Timeframe: 2 weeks after the second MVA-BN vaccination
2
Number of Participants with Serious Adverse Events (SAE)
Timeframe: From vaccination through study termination, up to 7 months
3
Number of Participants with Adverse Events of Special Interest (AESI)
Timeframe: From vaccination through study termination, up to 7 months
4
Number of Participants with Medically Attended Adverse Events (MAAE)
Timeframe: From vaccination through study termination, up to 7 months
5
Number of Participants with a Grade 3 or higher adverse event (AE)
Timeframe: The day of or within 28 days after either vaccination
6
Number of Participants with Solicited Local AE
Timeframe: The day of or within 7 days after either vaccination
7
Number of Participants with Solicited Systemic AE (body temperature, headache, fatigue, myalgia, nausea, chills)
. Acute or chronic condition that, in the opinion of the investigator, would render the trial procedures unsafe or would interfere with the evaluation of responses including, but not limited to, neurologic, cardiovascular, respiratory, hepatic, hematologic, rheumatologic, endocrine, gastrointestinal, renal, autoimmune, or immunosuppressive conditions
. History of or active autoimmune disease (vitiligo or thyroid disease requiring thyroid replacement are not exclusions), history of Guillain-Barré syndrome or Reye's syndrome
. Known immunodeficiency syndrome or known or suspected impairment of immunologic functions including, but not limited to, clinically significant liver disease, diabetes mellitus type I, or moderate to severe kidney impairment; HIV infection under stable HAART regimen (no change within the last 3 months) and CD4 count is \>500/µL is not considered immunodeficient
. Known or reported previous smallpox vaccination or vaccination with any licensed or investigational poxvirus-based vaccine
. History of monkeypox, cowpox, or vaccinia infection
. Close contact in the 3 weeks prior to signing the ICF with anyone known to have mpox
. History of malignancy other than squamous cell or basal cell skin cancer, unless there has been surgical excision at least 6 months prior to screening that is considered to have achieved cure
Timeframe: The day of or within 7 days after either vaccination
8
Number of Participants with Unsolicited AE
Timeframe: The day of or within 28 days after either vaccination