Ebola Virus Disease, Prevention
Conditions
Keywords
Ebola Virus Disease, Hemorrhagic Fever, Ebola, Vaccines, GP protein, Ebola virus, Ebola Virus Vaccines
Brief summary
The purpose of this study is to evaluate immunogenicity, epidemiological efficacy and safety of medicinal product GamEvac-Combi - Combined Vector-Based Vaccine against Ebola Virus Disease, 0.5 ml+0.5 ml/dose
Detailed description
This clinical trial is designed as a double blind randomized placebo-controlled study to evaluate immunogenicity of medicinal product GamEvac-Combi - Combined Vector-Based Vaccine against Ebola Virus Disease, 0.5 ml+0.5 ml/dose. The study includes three periods: screening, administration of the investigated product and follow-up. Vaccine will be administered to groups of volunteers (each group will include not more than 40 volunteers at a time; a new group of volunteers cannot be hospitalized before the earlier vaccinated volunteers are discharged from the hospital. In total, 8 visits will be held, including a screening visit; two of the visits will take place during the inpatient stage and six - during the outpatient observation. Study design in the both facilities will be the same for all volunteers, except that the biomaterial collected for immunogenicity evaluation from volunteers included in the study in the Russian Federation will be delivered directly to the testing laboratory; biomaterial from volunteers included in the study in the Republic of Guinea will undergo primary specimen processing, be frozen and stored under the assigned temperature conditions in the research center and, as biomaterial is accumulated, it will be transported in a fridge to the study site. In addition, laboratory tests for such concomitant infectious diseases, as yellow fever, Denge fever, Ebola and Marburg virus diseases will be carried out for epidemiological indications (i.e. in the endemic regions if disease cases are reported).
Interventions
BIOLOGICALGamEvac-Combi (vaccine)
vaccination
BIOLOGICALPlacebo
vaccination
Sponsors
CREMS (Centre de Recherche Epidémiologie, Microbiologie et Soins médicaux )
Gamaleya Research Institute of Epidemiology and Microbiology, Health Ministry of the Russian Federation
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
DOUBLE (Subject, Investigator)
Intervention model description
This clinical trial is designed as a double blind randomized placebo-controlled study
Eligibility
Sex/Gender
ALL
Age
18 Years to 60 Years
Healthy volunteers
Yes
Inclusion criteria
* Males and females within the age range from 18 to 60 years; * written informed consent; * absence of acute infectious diseases/relapses of chronic diseases at the time of vaccine administration and 7 days prior to the vaccination; * absence of severe allergic diseases in the medical history (anaphylactic shock, Quincke's edema, polymorphic exudative eczema, serum disease) * no serious post-vaccination complications in patient's history following the earlier administration of immunobiological products * negative blood or urine test for pregnancy (for child-bearing age females) not more than 24 hours prior to the administration of the first dose of investigated product; * absence of concomitant illnesses, especially dangerous or endemic for a particular region, proved by laboratory and/or clinical methods (malaria, yellow fever, Denge fever, Ebola or Marburg virus disease, poliomyelitis). * negative results of HIV, hepatitis B and C and syphilis tests. * adequate contraception for females and males of reproductive age. * negative results of urine test for narcotic drug residues; * negative result of breath alcohol test (in the expired air sample) * absence of haematological malignancies * absence of malignant neoplasms
Exclusion criteria
* \- volunteer involvement in another study over the last 90 days; * any immunization with vaccine over the last 30 days; * symptoms of acute respiratory diseases within the last 7 days; * administration of immunoglobulins or other blood products; taking immunosuppressive medications and/or immunomodulating agents over the last 3 months; * pregnancy or breast feeding; * exacerbation of allergic diseases, previous history of anaphylactic reactions or angioneurotic edema; * previous history of hypersensitivity or allergic reactions to the administration of any vaccines; * allergic reactions to the vaccine components; * presence of a concomitant illness which might affect the evaluation of study results: active tuberculosis form, chronic liver and kidney diseases, serious thyroid dysfunction or other endocrine disorders (diabetes mellitus), severe hematopoietic diseases, epilepsy and other CNS disorders, myocardial infarction in the medical history, myocarditis, endocarditis, pericarditis, ischemic heat disease and other illnesses which, in opinion of the investigator, make patient ineligible for study enrollment or may affect the course of the study. * blood donation (450 ml or more of blood or plasma) less than 2 months prior the study commencement date.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| determination of immunity duration by ELISA method | the total Time Frame is 12 month after the vaccination | immunity duration determination by ELISA method includes time points in which the assessment of the immunity response (antibody titer) should be provided (21, 28, 42 days and 3, 6, 12 months after the vaccination respectively) |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| assessment of antigen-specific cell-mediated immune response | on days 0 and 28 | determination of specific T-cell- mediated response to Ebola virus proteins vs. baseline values and placebo |
| determination of immunity duration in virus neutralization reaction | on days 0 and 42 | Determination of the immunity duration will be provided by the assessment of the neutralizing antibody titer for a virus in virus neutralization reaction vs. baseline values and placebo |
Other
| Measure | Time frame | Description |
|---|---|---|
| safety and tolerability | through study completion, an average of 1 year | Incidence in the healthy volunteers vital parameters changes and the occurrence of systemic and local post-vaccination reactions in comparison with placebo; reviewing its impact on the vital parameters in healthy volunteers (systolic and diastolic blood pressure, heart rate, respiration rate, body temperature) and the occurrence of systemic and local post-vaccination reactions in comparison with placebo |
| epidemiological effectiveness of vaccination | through study completion, an average of 1 year | 2\. Where possible, to evaluate epidemiological effectiveness of vaccination based on the follow-on morbidity indicators of immunized and non-immunized individuals, manifestations of the epidemiological process in time and space |
Countries
Guinea, Russia
Outcome results
None listed