Phase 3 randomized double-blind study of quadrivalent influenza vaccine versus trivalent influenza vaccines in adults

Phase 3, randomised, double-blind trial of quadrivalent influenza vaccine and influenza vaccine in influenza (3 arms), sponsored by Abbott Laboratories. Primary endpoints: Non-inferiority of post-vaccination HI geometric mean titers for shared strains and Superiority of QIV for alternate-lineage B strain. Started Jan 2015; status: completed.