6-year Antibody Check After Third Vaccination Against Japanese Encephalitis
Neutralizing Antibody Titers 6 Years After the Third Dose of Inactivated Japanese Encephalitis Vaccine and Projected Duration of Protection
研究概览
详细说明
Japanese Encephalitis (JE) is a potentially devastating mosquito-borne viral disease. The JE virus (JEV), a Flavivirus, is endemic to many regions in Asia, and while JE is primarily a pediatric disease in the endemic regions, travelers from non-endemic regions to Asia are usually naïve to the virus and may be at risk for contracting JE at any age.
The present study aims to investigate antibody titers at approximately 6 years after the third dose of JE vaccine (JE-VC), in a cohort of participants from an earlier booster dose trial, to strengthen the statistical model of the duration of protection after the booster.
研究类型
注册 (实际的)
阶段
- 第四阶段
联系人和位置
学习地点
-
-
Kinderspitalgasse 15
-
Vienna、Kinderspitalgasse 15、奥地利、1090
- Institute for Specific Prophylaxis and Tropical Medicine
-
-
参与标准
资格标准
适合学习的年龄
接受健康志愿者
有资格学习的性别
描述
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
Exclusion Criteria:
- Subjects who received a further dose of any Japanese Encephalitis Vaccine 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
- simultaneous participation in another clinical study
学习计划
研究是如何设计的?
设计细节
- 分配:不适用
- 介入模型:单组作业
- 屏蔽:无(打开标签)
武器和干预
参与者组/臂 |
干预/治疗 |
|---|---|
|
其他:Single arm
1 blood draw
|
One-time blood draw
|
研究衡量的是什么?
主要结果指标
结果测量 |
大体时间 |
|---|---|
|
Geometric Mean Titer (GMT) for JEV neutralizing antibodies determined by PRNT
大体时间:1.5 years
|
1.5 years
|
次要结果测量
结果测量 |
大体时间 |
|---|---|
|
Seroprotection Rate (SPR) defined as rate of subjects with JEV neutralizing antibody titers ≥1:10 in a PRNT
大体时间:1.5 years
|
1.5 years
|
其他结果措施
结果测量 |
大体时间 |
|---|---|
|
Projected mean duration of protection after a booster dose of JE-VC
大体时间:1.5 years
|
1.5 years
|
合作者和调查者
调查人员
- 首席研究员:Herwig Kollaritsch, Prof. Dr.、Medizinische Universität Wien, Institut für Spezifische Prophylaxe und Tropenmedizin 1090 Wien, Kinderspitalgasse 15
研究记录日期
研究主要日期
学习开始
初级完成 (实际的)
研究完成 (实际的)
研究注册日期
首次提交
首先提交符合 QC 标准的
首次发布 (估计)
研究记录更新
最后更新发布 (估计)
上次提交的符合 QC 标准的更新
最后验证
更多信息
此信息直接从 clinicaltrials.gov 网站检索,没有任何更改。如果您有任何更改、删除或更新研究详细信息的请求,请联系 register@clinicaltrials.gov. clinicaltrials.gov 上实施更改,我们的网站上也会自动更新.