Safety and Immunogenicity of Tdap Vaccine Compared to DTaP Vaccine in Children 4 to 6 Years of Age

Completed · Phase 3

Conditions studied: Tetanus, Diphtheria, Pertussis

In brief

Currently, there is no 5-component acellular pertussis vaccine licensed for the 5th dose in US children aged 4 to 6 years.This study is aimed at providing evidence of sero-protection, booster response and safety of this formulation as a 5th dose. Primary Objective: \- To compare the immune responses of Tetanus toxoid, reduced diphtheria toxoid, and acellular pertussis (Tdap) Vaccine to Diphtheria, tetanus and acellular pertussis (DTaP) vaccine (all antigens) when each is administered as a 5th dose and given concurrently, to children aged 4 to 6 years. Secondary/Observational Objectives: * To compare the immune responses for pertussis antigens of Tdap Vaccine to DTaP vaccine (for pertussis antigens) when each is administered as a 5th dose and given concurrently, to children aged 4 to 6 years. * To present the long-term immunogenicity at 1-, 3-, and 5-years post-vaccination after each long-term follow-up. * To describe the safety profile following vaccine administration.

Key facts

Study ID

NCT00467519

Run by

Sanofi Pasteur, a Sanofi Company

People needed

1045

Starts

2007-04-01

Expected to finish

2009-12-01

Last updated by the study team

2014-02-07

Who can join

Age: 4 and older, up to 6. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Healthy, as determined by medical history and physical examination.
• Aged 4 to 6 (< 7) years at the time of study vaccination on Day 0.
• Signed and dated informed consent form that has been approved by the Institutional Review Board (IRB) by the parent or legally authorized representative.
• Signed and dated informed assent form from the subject if required by the IRB.
• Able to attend scheduled visits at Visit 1 and Visit 2 and able to comply with all trial procedures. Subjects will be invited to participate in the long-term immunogenicity follow-up study but a commitment to participate in the long-term is not required as an inclusion criterion.
• Documented vaccination history of 4 previous doses of DAPTACEL according to the recommended national immunization schedule for Diphtheria, tetanus and acellular pertussis (DTaP).

You may not qualify if…

• Participation in another clinical trial in the 4 weeks preceding the trial vaccination.
• Planned participation in another clinical trial during the original trial period.
• Congenital or acquired immunodeficiency, immunosuppressive therapy such as anti-cancer chemotherapy or radiation therapy within the preceding 6 months, or long-term systemic corticosteroids therapy.
• Systemic hypersensitivity to any of the vaccine components or history of life-threatening reaction to the trial vaccine or a vaccine containing the same substances.
• Chronic illness at a stage that could interfere with trial conduct or completion.
• Blood or blood-derived products received in the past 3 months.
• Receipt of any other vaccine within 30 days prior to study vaccination, or planning to receive another vaccine within 30 days before the Visit 2 blood draw (with the exception of the annual influenza vaccine).
• History of diphtheria, tetanus or pertussis infection (confirmed either serologically or microbiologically).
• Thrombocytopenia or bleeding disorder contraindicating intra muscular vaccination.

Where it is running

• Study site — Birmingham, Alabama, United States
• Study site — Birmingham, Alabama, United States
• Study site — Fayetteville, Arkansas, United States
• Study site — Jonesboro, Arkansas, United States
• Study site — Little Rock, Arkansas, United States
• Study site — Fountain Valley, California, United States
• Study site — Huntington Beach, California, United States
• Study site — Oakland, California, United States
• Study site — Roseville, California, United States
• Study site — Sacramento, California, United States
• Study site — Norwich, Connecticut, United States
• Study site — Marietta, Georgia, United States
• Study site — Woodstock, Georgia, United States
• Study site — Bardstown, Kentucky, United States
• Study site — Crestview Hills, Kentucky, United States
• Study site — Louisville, Kentucky, United States
• Study site — Bossier City, Louisiana, United States
• Study site — Frederick, Maryland, United States
• Study site — Bellevue, Nebraska, United States
• Study site — Omaha, Nebraska, United States
• Study site — Omaha, Nebraska, United States
• Study site — Omaha, Nebraska, United States
• Study site — Rochester, New York, United States
• Study site — Fargo, North Dakota, United States
• Study site — Cleveland, Ohio, United States

Full record on ClinicalTrials.gov

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