Hypersensitivity to vaccine or formalin. History of severe hypersensitivity reaction &/or convulsive symptom to previous flu vaccination; Guillain-Barré syndrome, or other neurological disorders w/in 6 wk of previous flu vaccination; anaphylaxis reaction; suspected allergic reaction eg, systemic rash. Febrile disease or acute infection. Fever. Acute, exacerbated or active CV, renal or hepatic disease. Acute resp disease or other active infection.