Please assess the completion status of the following clinical trial:

Trial Title: The Phase IVb of Inactivated Enterovirus 71 Vaccine (Human Diploid Cell, KMB-17) in Chinese Children

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:~* Healthy subjects (6-71 months old children)~* The subjects' legal guardian voluntarily participate in the study and signed Informed Consent Form~* The subjects' legal guardian with the ability and objective to comply with the requirements of the protocol~Exclusion Criteria:~* Allergy to a vaccine , any ingredient of vaccine or substance used in the preparation process including excipients, formaldehyde, and kanamycin sulfate.~* Fever, acute illness~* Severe chronic disease, allergic diathesis

- Gender: ALL
- Minimum Age: 6 Months
- Maximum Age: 71 Months
- Healthy Volunteers: t

Study Arms:
- vaccine (3.0 EU) (Type: EXPERIMENTAL): healthy children (6-71 months old) have been injected by inactivated EV71 vaccine (KMB-17) of 3.0 EU (neutralization antibodies titer unit; 100 U in phase III clinical trials, or 320 EU (Elisa assay unit) in phase I and II clinical trials)

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