Study Comparing the Immune Response of Fluarix and Fluzone Influenza Vaccines

Inclusion Criteria:

• All adults 18 years and older.

• Subjects who the investigator believes can and will comply with the requirements ofthe protocol (e.g., return for follow-up visit and completion of the diary cards)should be enrolled in the study.

• Written informed consent obtained from the subject.

• If the subject is female, she must be of non-childbearing potential, i.e. eithersurgically sterilized or one year post-menopausal; or, if of childbearing potential,she must be abstinent or have used adequate contraceptive precautions .

Exclusion Criteria:

• Use of any investigational or non-registered product (drug or vaccine) within 30 dayspreceding the administration of the study vaccine, or planned use during the studyperiod.

• Has received any other licensed vaccines within 2 weeks (for inactivated vaccines) or 4 weeks (for live vaccines) prior to enrollment in this study.

• History of hypersensitivity to a previous dose of influenza vaccine.

• History of allergy or reactions likely to be exacerbated by any component of thevaccine(s) including egg, chicken protein, gelatine, formaldehyde, gentamicinsulphate, thimerosal or sodium deoxycholate.

• Acute disease at the time of enrollment. (Acute disease is defined as the presence ofa moderate or severe illness with or without fever. All vaccines can be administeredto persons with a minor illness such as diarrhea, mild upper respiratory infectionwith or without low-grade febrile illness, i.e. Oral temperature <37.5°C (99.5°F) /Axillary temperature <37.5°C (99.5°F)).

• History of Guillain Barré syndrome within 6 weeks of prior receipt of inactivatedinfluenza virus vaccine.

• Pregnancy and lactating females.