Nobilis Influenza H5N2 (inactivated whole avian influenza virus antigen of H5N2 subtype (strain A/duck/Potsdam/1402/86)) inducing an HI titre of ≥6.0 log2 as tested according to the potency test) is an inactivated vaccine used to protect healthy chickens against avian influenza type A, subtype H5. Administered to stimulate active immunity, reduce clinical signs, mortality, and viral shedding.