Please assess the completion status of the following clinical trial:

Trial Title: A Study to Evaluate Persistence of Immunity of PCV13 in Healthy Population Aged 2 Months，7 Months-5 Years

Study Design Characteristics:
- Allocation: NON_RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: PREVENTION
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE4
- Number of Arms: 4.0

Eligibility Criteria:
Inclusion Criteria:~* Those who have participated in the Phase III clinical study of Beijing Minhai PCV13 and have been fully vaccinated with Minhai PCV13;~* An informed consent was required to sign by their legal guardians;~* Volunteers and their legal guardians/caregivers were able to attend the study visit as required by the protocol.~Exclusion Criteria:~* Those who had any administration history of pneumococcal polysaccharide or conjugate vaccine after participating in the Phase III clinical study;~* Prior to enrollment, patients who had a history of pneumococcal infection with one or more of the well-defined PCV13 serotypes;~* The researchers shall judge the other conditions which might be not in compliance with the requirements of this clinical trial.

- Gender: ALL
- Minimum Age: 2 Months
- Maximum Age: 5 Years
- Healthy Volunteers: t

Study Arms:
- 2 months group (Type: OTHER): None
- 7-11 months group (Type: OTHER): None
- 12-23 months group (Type: OTHER): None
- 2-5 years old group (Type: OTHER): None

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