Study of Parenterally Administrated Adjuvanted Seasonal Influenza Vaccine in Healthy Elderly Volunteers

Inclusion Criteria: * Are aged 18 to 50 years for the young adult part of the study * Are aged 65 to 75 years for main study * Have signed a voluntary written informed consent. Volunteers should be cooperative, willing and able to participate and adhere to the Protocol requirements * Have minimum normal standard physical performance status Exclusion Criteria: * Volunteer has received seasonal Influenza vaccine of same antigenic composition within 6 months prior to enrolment * Volunteer having vaccine specific HI titres ≥ 40 * Volunteer is taking immunosuppressant drugs such as azathioprine, tacrolimus, cyclosporine, etc * Volunteers who have primary or secondary immunodeficiencies (e.g. Human Immunodeficiency Virus \[HIV\]) * Volunteers who have an autoimmune disease * Volunteer is taking oral, intramuscular or intravenous corticosteroids. Use is not permitted within 1 month of Screening. Inhaled corticosteroids to treat respiratory insufficiency (e.g. chronic obstructive pulmonary disease \[COPD\]), are permitted * Volunteer has a concurrent severe or uncontrolled underlying medical disease unrelated but that is likely to compromise volunteer safety and affect the outcome of the study * Volunteer has a neurotoxicity (Grade ≥2) * Volunteer has diarrhoea (Grade ≥2) * Volunteer has received other vaccines, within 1 month prior to enrolment * Volunteer has a history of any severe or life-threatening hypersensitivity reaction * Volunteer has an unstable systemic disease (including active infection, uncontrolled hypertension \[\> 160/100\], unstable angina, congestive heart failure, myocardial infarction within the previous year, serious cardiac arrhythmia requiring medication, hepatic, renal and metabolic disease) * Volunteer has recent history (within 6 months) of chronic alcohol or drug abuse of which may compromise the patient's safety or ability to participate in study activities * Volunteer has a history of psychiatric disorder that prevents patients from providing informed consent or following Protocol instructions * Volunteer is currently enrolled in an investigational device or drug trial, or \< 1 month since completing an investigational device or drug trial * Female volunteers who are pregnant or lactating (only applicable for Pre-Study) * Volunteer has any other factor that in the opinion of the Investigator (or designee) would make the patient unsafe or unsuitable for the study