Immunogenicity of One Dose of Gardasil and One Dose of Gardasil-9
Persistance of Anti-HPV After a Single Dose of Gardasil and the Effect of a Dose of Gardasil-9 When Administered 3-8 Years Later
Persistance of Anti-HPV After a Single Dose of Gardasil and the Effect of a Dose of Gardasil-9 When Administered 3-8 Years Later
Sponsor study identifier
interventional
32
1 country
1
Study Start
October 1, 2016
Actual (reported)Primary Completion
November 5, 2016
Actual (reported)Study Completion
December 5, 2016
Actual (reported)This study will assess the immunogenicity of one dose of Gardasil and one dose of Gardasil-9
Registry-reported information. Elapsed time and enrollment totals alone do not measure study progress or recruitment pace.
December 5, 2016
Actual (reported)Click on a node to explore related trials.
Some registry-reported names shown below are not yet linked in this graph.
Dates and qualifiers reported by the registry. Estimated dates do not confirm that a milestone has occurred.
October 1, 2016
Actual (reported)November 5, 2016
Actual (reported)December 5, 2016
Actual (reported)January 26, 2018
Actual (reported)February 13, 2018
Actual (reported)Anti-HPV seropositivity
Seropositivity to 9 HPV types included in Gardasil-9 vaccine will be assessed.
One month post vaccine administration.
HPV antibody titers
One month post vaccine administration
All subjects will receive one dose of Gardasil-9. Blodd samples for serological testing will be collected just before and one month post Gardasil-9 administration.
Registry-reported names are shown in full. Names without a link have not yet been matched to a Syfrah profile.
Contact the study team to confirm eligibility.
Laval University Research Hospital Center
Québec, G1E7G9, Canada
Guzun N, Ouakki M, Panicker G, Ionescu IG, Mayrand MH, Unger ER, Sauvageau C. Immune response after one dose of HPV vaccine among girls and boys and the impact of a second dose given after 3 or more years. Vaccine. 2025 Aug 30;62:127475. doi: 10.1016/j.vaccine.2025.127475. Epub 2025 Jul 14.
Gilca V, Sauvageau C, Panicker G, De Serres G, Schiller J, Ouakki M, Unger ER. Long intervals between two doses of HPV vaccines and magnitude of the immune response: a post hoc analysis of two clinical trials. Hum Vaccin Immunother. 2019;15(7-8):1980-1985. doi: 10.1080/21645515.2019.1605278. Epub 2019 Jun 3.
Gaston DeSerres, MD, PhD
Quebec Public Health Institute
32 participants (actual enrollment reported by the registry).
First Submitted
January 26, 2018
First Posted
February 13, 2018
Study Start
October 1, 2016
Actual (reported)Persistence of Immune Response Six Years After One Dose of 9vHPV Vaccine Among Male and Female Students
Primary Completion
November 5, 2016
Actual (reported)Study Completion
December 5, 2016
Actual (reported)Last Updated
February 13, 2018
Record last verified: 2018-02
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Source: ClinicalTrials.gov.
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