The primary objective is to compare multiplex immune response signatures following two (primary and a boost) vaccinations with the GSK AS03 adjuvanted H5N1 influenza vaccine, or the non-adjuvanted form of the H5N1 influenza vaccine, at the 3.75 mcg dose and given 21 days apart and identify differences in very early innate immune responses. These immune signatures will also be correlated with the clinical observations especially safety related local and systemic events.