Please assess the completion status of the following clinical trial:

Trial Title: HepB-CpG Series for Healthcare Workers Who Are Hepatitis B Vaccine Nonresponders

Study Design Characteristics:
- Allocation: None
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: PREVENTION
- Time Perspective: None
- Masking: NONE
- Phase: PHASE4
- Number of Arms: 1.0

Eligibility Criteria:
Inclusion Criteria:~* Willing to provide informed consent~* Willing to comply with all study procedures and be available for the duration of the study~* Healthcare workers who have received at least 5 doses of hepatitis B vaccine with aluminum adjuvant and have antiHBs \< 10mIU/ml~* Females of childbearing potential will be asked about the possibility of pregnancy as is the standard of care for immunization services. If a female indicates that she may be pregnant, study participation will be postponed until pregnancy is completed or the female reports that she is not pregnant.~Exclusion Criteria:~* Women who are pregnant or planning on becoming pregnant during the study~* Allergy to the vaccine or a component of the vaccine~* Not suitable for study participation due to other reasons, such as inability or unwillingness to comply with the study procedures, at the discretion of the investigators

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: t

Study Arms:
- Healthcare worker (Type: EXPERIMENTAL): Healthcare worker who has previously received at least 5 doses of hepatitis B vaccine with aluminum adjuvant (Recombivax B or Engerix B) and has an antibody to the hepatitis B surface antigen (antiHBs) that is less than 10 mIU/ml.

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