Actively Recruiting
Persistence of Immune Response Six Years After One Dose of 9vHPV Vaccine Among Male and Female Students
Led by Canadian Immunization Research Network · Updated on 2025-09-29
300
Participants Needed
1
Research Sites
18 weeks
Total Duration
On this page
AI-Summary
What this Trial Is About
Since the 2019-2020 school year, the province of Quebec (Canada) has been administering one dose of nonavalent (9vHPV) vaccine to students of all genders in Grade 4 of elementary school through the school-based program. Little data on the immunogenicity (antibody production) and long-term efficacy of a single dose of the vaccine are available, particularly in boys. The primary objective of this study is to assess the persistence of HPV antibodies six years after the administration of a single dose of the 9vHPV vaccine to students aged 9 to 11 years in Grade 4 in 2019-2020. The study will be conducted at the CHU de Québec-Université Laval research center. Recruitment is conducted through school service centers in the Quebec City region. Youth who received only a single dose of the 9vHPV vaccine at the ages of 9-11 in 2019-2020 will be eligible to participate. Approximately 300 youth will take part in this study: 150 girls and 150 boys. Participants will have to answer few questions about their health to ensure their eligibility for the study. For eligible participants consenting to participate a 10 ml (\<1 tablespoon) blood sample will be taken.
CONDITIONS
Official Title
Persistence of Immune Response Six Years After One Dose of 9vHPV Vaccine Among Male and Female Students
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Received a single dose of 9vHPV vaccine at ages 9 to 11 during the 2019-2020 school year
- Have not received any other HPV vaccine doses
- Able to provide consent to participate in the study
You will not qualify if you...
- Immunosuppressed at the time of recruitment or at vaccination
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Trial Site Locations
Total: 1 location
1
Centre de recherche du CHU de Québec-Université Laval
Québec, Quebec, Canada, G1X4S9
Actively Recruiting
Research Team
C
Chantal Sauvageau, MD
CONTACT
J
Jo-Ann Costa
CONTACT
How is the study designed?
Study Type
INTERVENTIONAL
Masking
NONE
Allocation
NA
Model
SINGLE_GROUP
Primary Purpose
PREVENTION
Number of Arms
1
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