Healthy adult subjects will be screened with the objective to randomize 96 subjects with the lowest levels of H3 hemagglutination inhibition (HAI) titers that meet all inclusion/exclusion criteria and have signed an informed consent. Subjects will be rank ordered from low to high based on their HAI titer. Subjects will then be assigned treatment based on a randomization to either active vaccine or placebo. The first two subjects dosed in each dose cohort will serve as sentinels and will receive active IP (not randomized).