Randomized, Double-blind, Placebo-controlled Phase III Clinical Trial to Assess the Efficacy and Safety of a Pentavalent Rotavirus Vaccine (BRV-PV) Against Severe Rotavirus Gastroenteritis Among Infants in Niger
试验速览
- 阶段
- 3 期
- 状态
- 已完成
- 发起方
- Epicentre
- 入组人数
- 6,586
- 试验地点
- 1
- 主要终点
- Laboratory-confirmed episode of severe rotavirus gastroenteritis
研究概览
简要总结
The study is a double-blinded, randomized, placebo-controlled, trial with two groups of infants receiving vaccine or placebo to assess the efficacy and safety of BRV-PV. Three doses of BRV-PV containing ≥ Log10 5.6 FFU/Dose of each serotype G1, G2, G3, G4 and G9 will be administered at 4 week intervals between doses. The first administration will occur at 6-8 weeks of age.
We hypothesize a difference in vaccine efficacy of three doses of BRV-PV vaccine vs. placebo against severe rotavirus gastroenteritis in healthy infants in Niger.
Active surveillance for gastroenteritis episodes will be conducted throughout the trial. Surveillance for adverse events will be carried out among all children from the time of first vaccination and 28 days post-Dose 3. Surveillance for all serious adverse events, including intussusception and death, will be conducted on all participants until they each reach two years of age.
To assess the effect of prenatal nutrition supplementation on infant immune response to the BRV-PV vaccine, study villages in the immunogenicity sub-cohort will be randomized in a 1:1:1 ratio to provide pregnant women with daily iron-folate, multiple micronutrients or a lipid-based nutrition supplement. Infants of participating women, if eligible at 6-8 weeks of age, will be randomized in a 1:1 ratio to receive three doses of vaccine or placebo and enter the main trial as part of the immunogenicity sub-cohort.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
入排标准
- 年龄范围
- 6 Weeks 至 2 Years（Child）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •aged 6-8 weeks at the time of inclusion
- •able to swallow and no history of vomiting within 24 hours
- •resident in Madarounfa Health District and within the catchment area of the central health facility
- •intending to remain in the study area for 2 years
- •parent/guardian providing written informed consent
排除标准
- •Any of the following will exclude an infant from randomization in the study:
- •known history of congenital abdominal disorders, intussusception, or abdominal surgery
- •receipt of intramuscular, oral, or intravenous corticosteroid treatment within 2 wks
- •receipt or planned administration of a blood transfusion or blood products, including immunoglobulins
- •any known immunodeficiency condition
- •any serious medical condition
- •any other condition in which, in the judgment of the investigator, would interfere with or serves as a contraindication to protocol adherence or the parent/guardian's ability to give informed consent
结局指标
主要结局
Laboratory-confirmed episode of severe rotavirus gastroenteritis
时间窗: From 28 days post-Dose 3 until 117 cases are accrued or when all participating infants reach 2 years of age if 117 cases are not attained
次要结局
- Laboratory-confirmed episode of rotavirus gastroenteritis with a Vesikari score of ≥ 17(From 28 days post-Dose 3 to 1 year of age, from 1 to 2 years of age, and from 28 days post-Dose 3 to 2 years of age)
- Episode of gastroenteritis of any cause(From 28 days post-Dose 3 to 1 year of age, from 1 to 2 years of age, and from 28 days post-Dose 3 to 2 years of age)
- Hospitalization of any cause(From 28 days post-Dose 3 to 1 year of age, from 1 to 2 years of age, and from 28 days post-Dose 3 to 2 years of age)
- Serious adverse events(From the time of Dose 1 until 2 years of age)
- Anti-rotavirus IgA sero-response rate(28 days post-Dose 3)
- Hospitalization due to laboratory-confirmed cases of rotavirus gastroenteritis of any cause(From 28 days post-Dose 3 to 1 year of age, from 1 to 2 years of age, and from 28 days post-Dose 3 to 2 years of age)
- Laboratory-confirmed episode of rotavirus gastroenteritis of any severity(From 28 days post-Dose 3 to 1 year of age, from 1 to 2 years of age, and from 28 days post-Dose 3 to 2 years of age)
- Laboratory-confirmed episode of severe rotavirus gastroenteritis due to rotavirus serotypes G1, G2, G3, G4 and G9(From 28 days post-Dose 3 to 1 year of age, from 1 to 2 years of age, and from 28 days post-Dose 3 to 2 years of age)
- Any adverse health event(From the time of Dose 1 to 28 days post-Dose 3)
- Anti-rotavirus IgA geometric mean titres(28 days post-Dose 3)