Please assess the completion status of the following clinical trial:

Trial Title: Immunogenicity and Reactogenicity of GlaxoSmithKline (GSK) Biologicals' Quadrivalent Split Virion Influenza Vaccine Fluarix Tetra (2015 Season Southern Hemisphere) in Adults 18 Years of Age and Above

Study Design Characteristics:
- Allocation: NON_RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: PREVENTION
- Time Perspective: None
- Masking: NONE
- Phase: PHASE3
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Subjects who, in the opinion of the investigator, can and will comply with the requirements of the protocol.~* Written informed consent obtained from the subject prior to performing any study specific procedure.~* A male or female aged 18 years or above at the time of vaccination.~* Healthy subjects with well-controlled chronic diseases as established by medical history and clinical examination before entering into the study.~* Female subjects of non-childbearing potential may be enrolled in the study.~* Female subjects of childbearing potential may be enrolled in the study, if the subject:~  * has practiced adequate contraception for 30 days prior to vaccination, and~ * has a negative pregnancy test on the day of vaccination and~ * has agreed to continue adequate contraception during the entire treatment period and for 2 months after completion of the vaccination series.~Exclusion Criteria:~* Use of any investigational or non-registered product (drug or vaccine) other than the study vaccine during the period starting 30 days before the dose of study vaccine (Day -29 to Day 0), or planned use during the study period.~* Any medical condition that in the judgment of the investigator would make intramuscular injection unsafe.~* Chronic administration (defined as more than 14 days in total) of immunosuppressants or other immune-modifying drugs during the period starting six months prior to the vaccine dose. For corticosteroids, this will mean prednisone ≥ 20 mg/day, or equivalent. Inhaled and topical steroids are allowed.~* Administration of long-acting immune-modifying drugs (e.g. rituximab, infliximab, etc.) within 6 months before study start, or planned administration during the study.~* Planned administration/administration of a vaccine not foreseen by the study protocol in the period starting 30 days before the study vaccination and during the entire study period.~* Administration of immunoglobulins and/or any blood products during the period starting 3 months before the first dose of study vaccine or planned administration during the study period.~* Administration of an influenza vaccine within the 6 months preceding the study start or planned use of such vaccines during the study period..~* Concurrently participating in another clinical study, at any time during the study period, in which the subject has been or will be exposed to an investigational or a non-investigational vaccine/product (pharmaceutical product or device).~* Clinically or virologically confirmed influenza infection within the six months preceding the study vaccination.~* Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination (no laboratory testing required).~* Acute disease and/or fever at the time of enrolment.~  * Fever is defined as temperature ≥ 38.0°C/100.4°F, measured by any means.~ * Subjects with a minor illness (such as mild diarrhoea, mild upper respiratory infection) without fever may, be enrolled at the discretion of the investigator.~* Acute or chronic, clinically significant pulmonary, cardiovascular, hepatic or renal functional abnormality, as determined by physical examination or laboratory screening tests.~* Chronic underlying disease (such as cancer, chronic obstructive pulmonary disease under oxygen therapy, insulin-dependent diabetes mellitus), not stabilised or clinically serious.~* History of chronic alcohol consumption and/or drug abuse as deemed by the investigator to render the potential subject unable/unlikely to provide accurate safety reports.~* History of Guillain-Barré syndrome.~* History of any reaction or hypersensitivity likely to be exacerbated by any component of the vaccine, including latex.~* History of severe adverse reaction to a previous influenza vaccination.~* Anaphylaxis following the administration of vaccine(s).~* Pregnant or lactating female.~* Female planning to become pregnant or planning to discontinue contraceptive precautions.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: t

Study Arms:
- Fluarix Tetra (Southern Hemisphere) Adult Group (Type: EXPERIMENTAL): Subjects aged 18-60 years received 1 dose of Fluarix™ Tetra (Southern Hemisphere) vaccine at Day 0. The vaccine was administered intramuscularly in the deltoid of the non-dominant arm.
- Fluarix Tetra (Southern Hemisphere) Elderly Group (Type: EXPERIMENTAL): Subjects aged \>60 years received 1 dose of Fluarix™ Tetra (Southern Hemisphere) vaccine at Day 0. The vaccine was administered intramuscularly in the deltoid of the non-dominant arm.

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