The HPV 9-10 Trial: Early Initiation of HPV Vaccination
Public ClinicalTrials.gov record NCT04722822. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
Every year, thousands of Americans die from cancers related to human papillomavirus (HPV). The vast majority of those deaths could be prevented with a safe and effective vaccine, yet many parents choose not have their children vaccinated when it is recommended at age 11 or 12. In this study, we will examine in a randomized trial whether earlier initiation of the vaccine at age 9-10 years will result in less parental refusal and higher rates of full vaccination at younger ages, before early sexual activity begins.
Study identification
- NCT ID
- NCT04722822
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Not applicable
- Enrollment
- 62,272 participants
Conditions and interventions
Conditions
Interventions
- (Intervention) Recommending HPV vaccine for patients 9-10 years of age Behavioral
- (Control) Recommending HPV vaccine for patients 11-12 years of age Behavioral
Behavioral
Eligibility (public fields only)
- Age range
- 9 Years to 13 Years
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Oct 3, 2021
- Primary completion
- Apr 29, 2026
- Completion
- May 31, 2026
- Last update posted
- Jul 15, 2026
2021 – 2026
United States locations
- U.S. sites
- 2
- U.S. states
- 2
- U.S. cities
- 2
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| University of California at Los Angeles | Los Angeles | California | 90095 | — |
| University of Colorado | Aurora | Colorado | 80045 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04722822, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jul 15, 2026 · Synced Sep 18, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04722822 live on ClinicalTrials.gov.