Adolescents' Response to Hepatitis B Vaccine Booster Dose
Public ClinicalTrials.gov record NCT01341275. 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.
Official title
Project to Evaluate Hepatitis B Vaccine-induced Immunity Among US-born Adolescents Who Received Hepatitis B Primary Vaccination Series During Early Childhood
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
The aims of this study are to determine: 1. the degree of immunity against hepatitis B, 2. factors associated with immunity against hepatitis B, 3. if the amount of antigen provided in a booster dose (used to measure the degree of immune memory) affects the body's response to the booster, and 4. if the age at which the vaccination was initiated during infancy affects duration of protection against hepatitis B among adolescents 16-19 years of age born in the United States who were immunized against hepatitis B as infants. These data will be important to evaluate the potential need for a possible booster dose of hepatitis B vaccine among adolescents. Study subjects eligible for enrollment will: * have blood drawn for baseline serologies * receive the hepatitis B booster dose (randomly determined to be either a 10 ug or 20 ug dose) * have blood drawn again 14 days later to determine if the booster dose has engendered an anamnestic response (a response attributed to prior immunity rather than a new response to the vaccine) The primary hypothesis is that the majority of young people will exhibit immune memory for hepatitis B in response to a booster dose of vaccine.
Study identification
- NCT ID
- NCT01341275
- Recruitment status
- Not listed
- Study type
- Interventional
- Phase
- Phase 4
- Enrollment
- 400 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 16 Years to 19 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
- Mar 31, 2010
- Primary completion
- Oct 31, 2011
- Completion
- Oct 31, 2011
- Last update posted
- Apr 24, 2011
2010 – 2011
United States locations
- U.S. sites
- 2
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Texas Children's Hospital | Houston | Texas | 77030 | Recruiting |
| Texas Children's Pediatric Associates | Houston | Texas | 77030 | Recruiting |
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 NCT01341275, 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 Apr 24, 2011 · Synced Sep 10, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT01341275 live on ClinicalTrials.gov.