Immunogenicity and Safety of 3 Adjuvated Reduced Dose Inactivated Polio Vaccines (IPV-Al SSI) and Non-adjuvated Full Dose IPV SSI, Given as Primary Vaccinations to Infants at 6, 10 and 14 Weeks of Age
试验速览
- 阶段
- 2 期
- 状态
- 已完成
- 入组人数
- 824
- 试验地点
- 1
- 主要终点
- For each of the 3 poliovirus types 1, 2 and 3, for the IPV-Al and IPV Vaccine SSI vaccines to evaluate: Type specific seroconversion rates based on baseline and 4 weeks post 3rd vaccincation
研究概览
简要总结
The background of the present clinical trial is the overall aim of the World Health Organization (WHO) to obtain eradication of polio in the world. As part of this overall plan, inactivated polio vaccine (IPV) against poliovirus types 1, 2 and 3, at an affordable price, needs to be available in low resource third world countries. The intention of the present phase II clinical trial is to determine if reduced dose(s) of IPV-Al SSI are safe in the target population and do not decrease the immunogenicity clinically significantly compared to full dose IPV Vaccine SSI. The infants will receive three doses of one of the trial vaccines according to the WHO Expanded Program on Immunization (EPI) schedule of 6, 10 and 14 weeks of age.
A total of 824 healthy infants will be included in the trial.
详细描述
The trial is a phase II, dose investigation, parallel and multi-group, observer-blind, randomised, controlled, multicentre and non-inferiority trial.
Three investigational reduced dose adjuvated IPV-Al SSI vaccines and full dose IPV SSI vaccine will be investigated in four parallel groups:
- 1/3 IPV-Al SSI
- 1/5 IPV-Al SSI
- 1/10 IPV-Al SSI
- IPV Vaccine SSI (comparator)
At Visit 1 (screening and 1st vaccination visit), written informed consent is obtained and the subject's eligibility is assessed according to the pre-specified in-/exclusion criteria, including measurement of axillary temperature. If the subject is included, a pre-vaccination blood sample is taken for polio antibody determinations, and the subject is randomly allocated into one of the four groups to be vaccinated.
The subject is observed for ½ an hour after the injection of the investigational medical product (IMP) and any immediate adverse events observed are to be recorded. A diary, thermometer and ruler are handed out to the parents/guardians so that they can measure daily the injection site reactions and the axillary temperature the first 3 days and record any adverse event until the next visit.
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
- 42 Days 至 49 Days（Child）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Infants of 6 weeks of age (+7 days) on date of first vaccination
- •Healthy assessed from medical history and physical examination
- •One parent/guardian has been properly informed about the trial and has signed the informed consent form
- •One parent/guardian grants access to the infant's trial related medical records
- •One parent/guardian is likely to comply with trial procedures
排除标准
- •Vaccinated with poliovirus vaccine (OPV or IPV), other than the trial vaccines, prior to inclusion or planned during the trial (e.g. on national polio immunisation days)
- •OPV vaccination or known exposure to poliovirus in household (living together) within 3 month prior to inclusion or planned during the trial
- •Has a sibling who is ≤5 years of age, and for whom OPV vaccination is planned during the trial
- •Low birth weight (< 2,500 g)
- •Known or suspected immunodeficiency (e.g. HIV, leukaemia, lymphoma) or family history of congenital or hereditary immunodeficiency
- •Severe uncontrolled chronic disease (e.g. neurologic, pulmonary, gastrointestinal, hepatic, renal or endocrine)
- •Known or suspected allergy to vaccine constituents (e.g. hypersensitivity to formaldehyde)
- •Acute severe febrile illness at day of vaccination deemed by the investigator to be a contraindication for vaccination
- •Uncontrolled coagulopathy or blood disorder contraindicating intramuscular injections or blood sampling
- •Treatment with a product which is likely to modify the immune response (e.g. blood products and immunoglobulins) prior to inclusion or planned during the trial
- •Participating in another clinical trial
- •Not suitable for inclusion in the opinion of the investigator
研究组 & 干预措施
1/3 IPV-Al SSI
3 vaccinations of 1/3 IPV-Al SSI given at 6, 10 and 14 weeks of age
干预措施: Primary series of immunisation comprised by 3 vaccinations IPV-Al SSI (Biological)
1/5 IPV-Al SSI
3 vaccinations of 1/5 IPV-Al SSI given at 6, 10 and 14 weeks of age
干预措施: Primary series of immunisation comprised by 3 vaccinations IPV-Al SSI (Biological)
1/10 IPV-Al SSI
3 vaccinations of 1/10 IPV-Al SSI given at 6, 10 and 14 weeks of age
干预措施: Primary series of immunisation comprised by 3 vaccinations IPV-Al SSI (Biological)
IPV Vaccine SSI
3 vaccinations of IPV Vaccine SSI given at 6, 10 and 14 weeks of age, The comparator IPV Vaccine SSI contains: Type 1: 40DU, Type 2: 8 DU and Type 3: 32 DU.
干预措施: IPV Vaccine SSI (Biological)
结局指标
主要结局
For each of the 3 poliovirus types 1, 2 and 3, for the IPV-Al and IPV Vaccine SSI vaccines to evaluate: Type specific seroconversion rates based on baseline and 4 weeks post 3rd vaccincation
时间窗: Change from baseline to 4 weeks post 3rd vaccincation
次要结局
- Type-specific geometric mean titers (GMTs)(4 weeks post 3rd vaccination for each vaccine)
- Type-specific seroprotection rates (titers ≥ 1/8)(4 weeks post 3rd vaccination for each vaccine)
- Type-specific reverse cumulative titer distribution curves based on pre-vaccination and 4 weeks post 3rd vaccination serum titers for each vaccine(4 weeks post 3rd vaccination for each vaccine)
- Adverse events following the vaccinations for each vaccine(From inclusion to 4 weeks post 3rd vaccincation)