Testing Hepatitis B Vaccine Booster Doses in Young Adults
Tests hepatitis B vaccine booster doses in young adults lacking protective antibodies against hepatitis B.
Plain-language title generated from the registry record
Registry title: The Immune Responses After Hepatitis B Revaccination Doses in a Young Cohort
Key facts
- Where
- Taipei, TaiwanSee the site
Could this be for you?
Answer for yourself. This is not a decision: only the study team can say whether you can take part.
- Are you between 20 and 36 years old?
Source: NCT04970836, who can take part
Where in Taiwan
- Family Medicine, NTUHTaipei, TaiwanTaking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Trial details
- Who runs it
- National Taiwan University Hospital
- Trial code
- NCT04970836
- Record updated
- 21 October 2026
- Original description
This prospective cohort study aims to provide the evidence-based clinical guide to help decide the revaccination doses of hepatitis B vaccine that the high-risk young adults without hepatitis B seroprotective antibodies (anti-HBs titer<10 mIU/mL) need to take.Read full original descriptionShow less
The Immune Responses After Hepatitis B Revaccination Doses in a Young Cohort
This prospective cohort study aims to provide the evidence-based clinical guide to help decide the revaccination doses of hepatitis B vaccine that the high-risk young adults without hepatitis B seroprotective antibodies (anti-HBs titer<10 mIU/mL) need to take.
Inclusion: The actual age at the time of admission was higher than 20 years old and birth year after 1987; Born in Taiwan and had received a full course of hepatitis B vaccines at least three doses at infant period; Those who have tested negative for hepatitis B surface antibody and surface antigen at baseline; Have never been vaccinated against hepatitis B in childhood and adolescence by questionnaire; Consent to administer 1-2 doses of hepatitis B vaccine according to the assigned group after sharing decision making process; In good health.
Exclusion: Those who were previously allergic to hepatitis B vaccine or its components (such as yeast); Those who have been vaccinated against hepatitis B during childhood and adolescence; Those who have a positive test for hepatitis B surface antibody or a positive test for hepatitis B surface antigen.