Start HPV shots at age 9? new study aims to save lives
NCT ID NCT04722822
First seen Jun 27, 2026 · Last updated Jul 17, 2026 · Updated 2 times
Summary
This study tests if giving the HPV vaccine to children at age 9-10, instead of the usual 11-12, leads to more kids getting fully vaccinated before they are exposed to the virus. The goal is to prevent HPV-related cancers later in life. About 3,100 children in Colorado and California are taking part.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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62,272 people
The number who actually took part.
- Started
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Oct 2021
- Finished
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Jun 2026
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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9 to 13 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Practices: Inclusion Criteria: * Practices in Metro Denver, Colorado and Metro Los Angeles, California (specifically UCLA medical clinics and clinics affiliated with Children's Hospital of Orange County) * Practices that have at least 60% of providers agree to participate * Practices do not currently recommend HPV at 9-10 years. * Practice must have at least 100 eligible patients age 9-13 years Exclusion Criteria: * Practices with less than 100 eligible patients age 9-13 years * Practices currently routinely recommend HPV vaccine at 9-10 years. * Practices where less than 60% of providers agree to participate in the study. Patient Eligibility Criteria * Patient age 9-13 years * Seen at a participating practice in the last 3 years * Due for at least 1 dose of HPV vaccine
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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University of California at Los Angeles
Los Angeles, California, 90095, United States
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University of Colorado
Aurora, Colorado, 80045, United States
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Other studies related to the condition(s) this trial covers.
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