Please assess the completion status of the following clinical trial:

Trial Title: A Study of an Investigational Zoster Vaccine, in Subjects With a History of Herpes Zoster (V211-014)

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: PREVENTION
- Time Perspective: None
- Masking: DOUBLE
- Phase: PHASE3
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Adults ≥ 50 years of age with a history of herpes zoster ≥ 5 years prior to enrollment~Exclusion Criteria:~* History of allergy to any vaccine component~* Prior receipt of a varicella or zoster vaccine~* Ability to defend against infection is suppressed by a medical condition or medication

- Gender: ALL
- Minimum Age: 50 Years
- Maximum Age: None
- Healthy Volunteers: t

Study Arms:
- ZOSTAVAX™ / Placebo (Type: EXPERIMENTAL): Zoster vaccine live on Day 1 (Period 1), placebo on Week 4 (Period 2)
- Placebo / ZOSTAVAX™ (Type: EXPERIMENTAL): Placebo on Day 1 (Period 1), zoster vaccine live on Week 4 (Period 2)

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