Please assess the completion status of the following clinical trial:

Trial Title: Immune Response to Hepatitis B Virus Booster Vaccination After 20-23 Years

Study Design Characteristics:
- Allocation: None
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: PREVENTION
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 1.0

Eligibility Criteria:
Inclusion Criteria:~* healthy adults 20-25 years old~Exclusion Criteria:~* Hepatitis B surface antigen (+)~* Hepatitis B core antibody (+)~* any history of liver disorders including hepatitis~* HIV Ag or Ab(+)

- Gender: ALL
- Minimum Age: 20 Years
- Maximum Age: 25 Years
- Healthy Volunteers: t

Study Arms:
- HBV booster vaccination (Type: EXPERIMENTAL): None

Based on this trial design, predict the completion outcome and termination type (if applicable).