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Clinical Trial Summary

This study is to assess the longevity of immune response in adolescents for approximately 48 months after receipt of a primary series of bivalent rLP2086 vaccination, which is then followed by a booster dose and an assessment of immune response for 12 or 26 months post booster vaccination.


Clinical Trial Description

This study is to assess the longevity of immune responses in adolescents (aged 10 to <19 years at the time of entry into a primary study) following receipt of a vaccination regimen of 2 or 3 doses of bivalent rLP2086 in a primary study. A booster dose of bivalent rLP2086 at approximately 48 months was given following the final dose of the 2- or 3-dose primary bivalent rLP2086 vaccination series. The study was therefore divided into Stage 1 (4-year persistence of immune responses following receipt of a primary vaccination series) and the booster stage (follow-up through 12 months for all boosted or 26 months for a subset of the boosted).

Subjects participating only in Stage 1 will attend up to 6 study visits for collection of a 20-mL blood sample at each visit. Subjects participating in both Stage 1 and booster stage will attend up to 9-10 study visits with 1 visit for booster dose vaccination and 8-9 visits for collection of a 20-mL blood sample at each visit. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT01543087
Study type Interventional
Source Pfizer
Contact
Status Completed
Phase Phase 3
Start date September 7, 2012
Completion date January 5, 2018

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