E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
Healthy volunteers [Booster immunisation against diphtheria, tetanus and pertussis diseases of individuals from age of four years onwards. The study population for this study will include individuals aged four years and above. |
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E.1.1.1 | Medical condition in easily understood language |
Diphtheria
Lock jaw
Whopping cough
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E.1.1.2 | Therapeutic area | Diseases [C] - Bacterial Infections and Mycoses [C01] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 20.0 |
E.1.2 | Level | SOC |
E.1.2 | Classification code | 10021881 |
E.1.2 | Term | Infections and infestations |
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 |
To assess the immune response to the dTpa vaccine in terms of seroprotection status for antibodies against diphtheria and tetanus antigens and in terms of seropositivity status for anti-bodies against the pertussis antigens [pertussis toxoid (PT), filamentous haemagglutinin (FHA) and pertactin (PRN)], one month after vaccination. |
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E.2.2 | Secondary objectives of the trial |
• To assess the immune response in terms of booster response to diphtheria, tetanus, PT, FHA, and PRN antigens, one month after vaccination.
• To assess the immune response in terms of antibody concentrations to diphtheria, tetanus, PT, FHA, and PRN antigens, one month after vaccination.
• To assess the reactogenicity and safety of Boostrix in terms of solicited symptoms (local and general), unsolicited adverse events (AEs) and serious adverse events (SAEs) |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
• Subjects or subjects’ parent(s)/adoptive parent(s) who, in the opinion of the investigator, can and will comply with the requirements of the protocol.
• A male or female four years of age and older.
• Written informed consent obtained from the subject/from the parent(s)/ adoptive parent(s) of the subject prior to performing any study specific procedure.
• Written informed assent obtained from subjects aged 14 years to <18 years.
• Healthy subjects as established by medical history and physical examination before entering into the study.
• Children four to seven years of age who have received diphtheria, tetanus and pertussis vaccination prior to study enrolment as per local recommendations.
• Subjects eight years of age and older who have received diphtheria, tetanus and pertussis vaccination to the best of their/subjects’ parent(s)/subjects’ adoptive parent(s) knowledge and did not receive an additional diphtheria, tetanus or pertussis vaccination within 5 years prior to enrolment in the study will be enrolled.
•Female subjects of non-childbearing potential may be enrolled in the study.
Non-childbearing potential is defined as pre-menarche, current tubal ligation, hysterectomy, ovariectomy or post-menopause.
•Female subjects of childbearing potential may be enrolled in the study, if the subject:
-has practiced adequate contraception within 30 days prior to vaccination, and
-has a negative pregnancy test on the day of vacci-nation, and
-has agreed to continue adequate contraception during the entire treatment period and for 1 month after completion of the vaccination.
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E.4 | Principal exclusion criteria |
• Child in care
• Use of any investigational or non-registered product other than the study vaccine within 30 days preceding the dose of study vaccine, or planned use during the study period.
• History of previous or intercurrent diphtheria, tetanus or pertussis diseases since birth in subjects four to seven years of age.
• History of previous or intercurrent diphtheria, tetanus or pertussis diseases within 5 years prior to enrolment in subjects aged eight years and above.
• Chronic administration (defined as more than 14 days in total) of immunosuppressants or other immune-modifying drugs within six months prior to the vaccine dose. For corticosteroids, this will mean prednisone ≥ 20 mg/day (for adult subjects, ≥18 years of age) or ≥ 0.5 mg/kg/day (for paediatric subjects, aged 4-17 years), or equivalent. Inhaled and topical steroids are allowed
• Administration of long-acting immune-modifying drugs at any time during the study period.
• Planned administration/administration of a vaccine not foreseen by the study protocol within the period starting 30 days before and ending 30 days after the dose of vaccine with the exception of inactivated influenza vaccine which can be given at any time during the study conduct as per the Summary of Product Characteristics (SPC) or PI and according to the local governmental recommendations.
• Concurrently participating in another clinical study, at any time during the study period, in which the subject has been or will be exposed to an investigational or a non-investigational vaccine/product (pharmaceutical product or device).
• Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination.
• Family history of congenital or hereditary immunodeficiency.
• History of any reaction or hypersensitivity likely to be exacerbated by any component of the vaccine.
• Hypersensitivity to latex.
• History of encephalopathy after administration of a previous dose of pertussis vaccine that could not be attributed to another identifiable cause, progressive neurologic disorder, uncontrolled epilepsy or progressive encephalopathy: pertussis vaccine should not be administered to individuals with these conditions until a treatment regimen has been established and the condition has stabilized.
• Acute disease and/or fever at the time of enrolment.
Fever is defined as temperature >= 38.0°C / 100.4°F. The preferred location for measuring temperature in this study will be the axilla.
Subjects with a minor illness (such as mild diarrhoea, mild upper respiratory infection) without fever may, be enrolled at the discretion of the investigator.
• Acute or chronic, clinically significant pulmonary, cardio-vascular, hepatic or renal functional abnormality, as determined by physical examination or laboratory screening tests.
• Administration of immunoglobulins and/or any blood products within the 3 months preceding the dose of study vaccine or planned administration during the study period.
• Pregnant or lactating female.
• Female planning to become pregnant or planning to discontinue contraceptive precautions during the study conduct.
• Any medical condition that, in the opinion of the investigator, might interfere with the evaluations required by the study.
• Any medical condition that in the judgment of the investigator would make intramuscular injection unsafe. |
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E.5 End points |
E.5.1 | Primary end point(s) |
• Number of seroprotected subjects for anti-diphtheria (anti-D) and anti-tetanus (anti-T).
A seroprotected subject is a subject whose anti-D and anti-T concentrations are ≥ 0.1 IU/ml.
• Number of seropositive subjects for anti-pertussis toxoid (anti-PT), anti-filamentous haemagglutinin (anti-FHA) and anti-pertactin (anti-PRN).
A seropositive subject is a subject whose antibody concentration is greater than or equal to the assay cut-off value. |
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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) |
• Booster response to the D, T, PT, FHA and PRN antigens
Booster response to D and T antigens is defined as:
- for initially seronegative subjects (pre-vaccination concentration below cut-off:
< 0.1 IU/ml): antibody concentrations at least four times the cut-off (post-vaccination concentration >= 0.4 IU/ml), and
- for initially seropositive subjects (pre-vaccination concentration >= 0.1 IU/ml): an increase in antibody concentrations of at least 4 times the pre-vaccination concentration.
Booster response to PT, FHA and PRN antigens is defined as:
- for subjects with pre-vaccination antibody concentration < 5 EL.U/ml: antibody concentration >= 20 EL.U/m;
- for subjects with pre-vaccination antibody concentration >= 5 EL.U/ml and
< 20 EL.U/ml: antibody concentration at least 4 times the pre-vaccination concentration; and
- for subjects with pre-vaccination antibody concentration 20 EL.U/ml: antibody concentration at least two times the pre-vaccination concentration.
• Anti-diphtheria, anti-tetanus, anti-PT, anti-FHA and anti-PRN antibody concentrations
Concentrations are expressed as geometric mean concentra-tions (GMCs).
• Number of subjects with solicited local and general symptoms
Occurrence of each solicited local and general symptom and occurrence of large swelling reactions.
• Number of subjects with unsolicited adverse events (AEs)
An unsolicited AE was defined as Any AE reported in addition to those solicited during the clinical study. Also any ‘solicited’ symptom with onset outside the specified period of follow-up for solicited symptoms will be reported as an unsolicited adverse event.
• Number of subjects with serious adverse events (SAEs)
A SAE is any untoward medical occurrence that results in death, is life-threatening, requires hospitalisation or prolongation of existing hospitalisation, results in disability/incapacity or is a congenital anomaly/birth defect in the offspring of a study subject. |
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E.5.2.1 | Timepoint(s) of evaluation of this end point |
Day 31
Day 31
During the 4-day (Day 1–4) follow-up period after vaccination
During the 31-day (Day 1–31) follow-up period after vaccination
From Day 1 to Day 31 |
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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 | Yes |
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) | Yes |
E.7.4 | Therapeutic use (Phase IV) | No |
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 | No |
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.8.2.4 | Number of treatment arms in the trial | 1 |
E.8.3 |
Will this trial be conducted at a single site globally?
| No |
E.8.4 | Will this trial be conducted at multiple sites globally? | Yes |
E.8.6 Trial involving sites outside the EEA |
E.8.6.2 | Trial being conducted completely outside of the EEA | Yes |
E.8.6.3 | Specify the countries outside of the EEA in which trial sites are planned |
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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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Last testing results released of samples collected at Visit 2 |
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.2 | In all countries concerned by the trial years | 1 |
E.8.9.2 | In all countries concerned by the trial months | 0 |
E.8.9.2 | In all countries concerned by the trial days | 0 |