E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Study population: adult volunteers who received a booster dose of JE-VC in prestudy IC51-311, no specific medical condition is investigated, only antibody check. |
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E.1.1.1 | Medical condition in easily understood language |
No medical condition is investigated. Duration of protection after vaccination against Japanese Encephalitis virus |
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E.1.1.2 | Therapeutic area | Diseases [C] - Virus Diseases [C02] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 16.1 |
E.1.2 | Level | LLT |
E.1.2 | Classification code | 10023123 |
E.1.2 | Term | Japanese encephalitis |
E.1.2 | System Organ Class | 10021881 - Infections and infestations |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 16.1 |
E.1.2 | Level | LLT |
E.1.2 | Classification code | 10069544 |
E.1.2 | Term | Japanese encephalitis immunization |
E.1.2 | System Organ Class | 10042613 - Surgical and medical procedures |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 16.1 |
E.1.2 | Level | LLT |
E.1.2 | Classification code | 10023120 |
E.1.2 | Term | Japanese B viral encephalitis |
E.1.2 | System Organ Class | 10021881 - Infections and infestations |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 16.1 |
E.1.2 | Level | LLT |
E.1.2 | Classification code | 10023122 |
E.1.2 | Term | Japanese B virus encephalitis |
E.1.2 | System Organ Class | 10021881 - Infections and infestations |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 16.1 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10069535 |
E.1.2 | Term | Japanese encephalitis immunisation |
E.1.2 | System Organ Class | 10042613 - Surgical and medical procedures |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 16.1 |
E.1.2 | Level | LLT |
E.1.2 | Classification code | 10023119 |
E.1.2 | Term | Japanese B encephalitis |
E.1.2 | System Organ Class | 10021881 - Infections and infestations |
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E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 16.1 |
E.1.2 | Level | PT |
E.1.2 | Classification code | 10014596 |
E.1.2 | Term | Encephalitis Japanese B |
E.1.2 | System Organ Class | 10021881 - Infections and infestations |
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E.1.3 | Condition being studied is a rare disease | No |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
Primary objective is to refine the mathematical modeling of antibody decline and the duration of protection following a booster of JE-VC. |
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E.2.2 | Secondary objectives of the trial |
Secondary objective is to determine the persistence of JEV neutralizing antibodies approximately 6 years after a booster dose of JE-VC. |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
Subjects who received a booster dose of JE-VC in study IC51-311
Subjects who are willing to give written informed consent to participate in the trial |
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E.4 | Principal exclusion criteria |
Subjects who received a further dose of any Japanese Encephalitis since study IC51-311.
Severe immunosuppression (as result of medical conditions or medication) since study IC51-311, such as history of radiation therapy or cytostatic therapy.
Current participation in another trial.
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E.5 End points |
E.5.1 | Primary end point(s) |
Geometric Mean Titer (GMT) for JEV neutralizing antibodies determined by PRNT. |
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E.5.1.1 | Timepoint(s) of evaluation of this end point |
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E.5.2 | Secondary end point(s) |
Seroprotection Rate (SPR) defined as rate of subjects with JEV neutralizing antibody titers ≥ 1:10 in a PRNT50
SPR stratified by Tick-borne encephalitis vaccination history.
GMT stratified by Tick-borne encephalitis vaccination history.
Projected mean duration of protection after a booster dose of JE-VC. |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
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E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | Yes |
E.6.3 | Therapy | No |
E.6.4 | Safety | No |
E.6.5 | Efficacy | No |
E.6.6 | Pharmacokinetic | No |
E.6.7 | Pharmacodynamic | No |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | No |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | No |
E.7.3 | Therapeutic confirmatory (Phase III) | No |
E.7.4 | Therapeutic use (Phase IV) | Yes |
E.8 Design of the trial |
E.8.1 | Controlled | No |
E.8.1.1 | Randomised | No |
E.8.1.2 | Open | Yes |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | No |
E.8.1.5 | Parallel group | No |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | Yes |
E.8.1.7.1 | Other trial design description |
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E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | No |
E.8.2.2 | Placebo | No |
E.8.2.3 | Other | No |
E.8.3 |
The trial involves single site in the Member State concerned
| Yes |
E.8.4 | The trial involves multiple sites in the Member State concerned | No |
E.8.5 | The trial involves multiple Member States | Yes |
E.8.5.1 | Number of sites anticipated in the EEA | 2 |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | No |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
E.8.7 | Trial has a data monitoring committee | No |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
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After LVLS, evaluation (according to study endpoints) will be performed. |
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 0 |
E.8.9.1 | In the Member State concerned months | 2 |
E.8.9.1 | In the Member State concerned days | 15 |
E.8.9.2 | In all countries concerned by the trial years | 0 |
E.8.9.2 | In all countries concerned by the trial months | 2 |
E.8.9.2 | In all countries concerned by the trial days | 15 |