Please assess the completion status of the following clinical trial:

Trial Title: Efficacy of COVID-19 Vaccination in Patients With Multiple Sclerosis Treated With Immune Modulating Medication

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:~1. Able to understand the purpose, benefits, and risks of the study; willing and able to adhere to the study requirements; able to provide informed consent in English~2. Male or female, between the ages of 18 and 65 years inclusive at time of consent~3. Meet one of the following:~   1. Plan to receive one of the FDA approved mRNA-based COVID SARS-CoV-2 vaccinations within 30 days of the screening visit~  2. Have received one of the FDA approved mRNA-based COVID SARS-CoV-2 vaccinations, their first vaccine injection having occurred 45±7 days prior to the screening visit~  3. Have received one of the FDA approved mRNA-based COVID SARS-CoV-2 vaccinations, their first vaccine injection having occurred 90±7 days prior to the screening visit~4. Meet the criteria of one of the four groups at the time of consent:~Group 1: Diagnosed with multiple sclerosis and currently being treated with a stable dose of ocrelizumab, for 6 months or longer Group 2: Diagnosed with multiple sclerosis and currently being treated with a stable dose of fingolimod, for 6 months or longer Group 3: Diagnosed with multiple sclerosis and currently being treated with a stable dose of natalizumab, for 6 months or longer Group 4: Diagnosed with multiple sclerosis and currently being treated with a stable dose of dimethyl fumarate or diroximel fumarate, for 6 months or longer~Exclusion Criteria:~1. Subjects who have a BMI of \>35.0 will be excluded

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 65 Years
- Healthy Volunteers: f

Study Arms:
- MS subjects who are being treated with ocrelizumab (Type: None): Ocrelizumab's immunomodulating mechanisms of action is B-cell lytic. Each consenting subject will provide approximately 30 mL of whole blood via venipuncture before and 45, 90 and 180 days after the first vaccine injection and 28-42 days after the booster vaccination (if applicable).
- MS subjects who are being treated with fingolimod (Type: None): Fingolimod's immunomodulating mechanisms of action is to prevent mobilization of B and T cells from peripheral lymphoid organs. Each consenting subject will provide approximately 30 mL of whole blood via venipuncture before and 45, 90 and 180 days after the first vaccine injection and 28-42 days after the booster vaccination (if applicable).
- MS subjects who are being treated with natalizumab (Type: None): Natalizumab's immunomodulating mechanisms of action is to block transmigration of monocytes, and lymphocytes into the central nervous system. Each consenting subject will provide approximately 30 mL of whole blood via venipuncture before and 45, 90 and 180 days after the first vaccine injection and 28-42 days after the booster vaccination (if applicable).
- MS subjects who are being treated with dimethyl fumarate/diroximel fumarate (Type: None): Dimethyl Fumarate's immunomodulating mechanisms of action is to reduce inflammation-induced oxidative stress. Each consenting subject will provide approximately 30 mL of whole blood via venipuncture before and 45, 90 and 180 days after the first vaccine injection and 28-42 days after the booster vaccination (if applicable).

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

Answer: outcome: terminate
termination_type: feasibility