Please assess the completion status of the following clinical trial:

Trial Title: Study to Investigate the Immune Response and Safety of Prophylactic Vaccines in Patients Treated for Multiple Sclerosis

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: COHORT
- Primary Purpose: None
- Time Perspective: PROSPECTIVE
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria:~* Established diagnosis of Multiple Sclerosis~* Age: 18 - 70 years~* Indication for vaccination (according to public recommendation)~* Written informed consent~Exclusion Criteria:~* Current relapse of MS~* Unstable disease~* Contraindication for vaccination (acute infection, fever, allergy to vaccine)~* Unable to comply with study procedures

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 70 Years
- Healthy Volunteers: f

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