Study to Evaluate Safety and Immunogenicity of Sub-unit Adjuvanted Influenza Vaccine Administered to Elderly Subjects, Formulation 2011-2012

Key Inclusion Criteria: * Males and females volunteers of 65 years of age or older, mentally competent, willing and able to give written informed consent prior to study entry. * Individuals able to comply with all the study requirements. * Individuals in good health as determined by the outcome of medical history, physical examination and clinical judgment of the investigator. * Written informed consent must be obtained for all the subjects before enrollment into the study after the nature of the study has been explained. Key Exclusion Criteria: * Individuals with any serious chronic or acute disease. * Individuals with history of any anaphylactic reaction and/or serious allergic reaction following a vaccination. * Individuals with known or suspected impairment/alteration of immune function. * Individuals with known or suspected history of drug or alcohol abuse. * Individuals with a bleeding diathesis or conditions associated with prolonged bleeding time that in the investigator's opinion would interfere with the safety of the subject. * Individuals within the past 6 months, they have: had any seasonal or pandemic laboratory confirmed influenza disease; received any seasonal or pandemic influenza vaccine. * Individuals with any acute or chronic infections requiring systemic antibiotic treatment or antiviral therapy within the last 7 days. * Individuals that have experienced fever (i.e., axillary temperature ≥38°C) within the last 3 days of intended study vaccination. * Individuals participating in any clinical trial with another investigational product 4 weeks prior to first study visit or intent to participate in another clinical study at any time during the conduct of this study. * Individuals who received any other vaccines within 4 weeks prior to enrollment in this study or who are planning to receive any vaccine within 4 weeks from the study vaccines. * Individuals who are part of study personnel or close family members conducting this study. * BMI \> 35 kg/m2.