Early Immune Responses to Inactivated Influenza Vaccine: a Pilot Study

Inclusion Criteria:

1. Age between 18-50 years.

2. Good general health as a result of review of medical history and medications.

3. Willingness to participate in the study as evidenced by signing informed consent
document.

4. Available for the duration of the trial.

Exclusion Criteria:

1. Known to be pregnant.

2. Medical, behavioral, cognitive or psychiatric disease that in the opinion of the
investigator affects the ability of the participant to understand and cooperate with
the study protocol.

3. Severe allergy to eggs or any component of the influenza vaccine

4. Previous receipt of the 2011-2012 season influenza vaccine

5. Other condition that in the opinion of the investigator would jeopardize the safety or
rights of a participant participating in the trial or would render the subject unable
to comply with the protocol.

6. History of receiving any investigational product within the past 30 days.

7. Participant has had medical, occupational, or family problems as a result of alcohol
or illicit drug use during the past 12 months.

8. History of a severe allergic reaction or anaphylaxis.

9. Pre-existing autoimmune or antibody-mediated diseases including but not limited to:
systemic lupus erythematosus, rheumatoid arthritis, multiple sclerosis, Sjögren's
syndrome, or autoimmune thrombocytopenia.

10. Known immunodeficiency syndrome.

11. Use of chronic (≥14 days) oral or intravenous corticosteroids (excluding topical or
nasal) at immunosuppressive doses (i.e. prednisone >10 mg/ day) or immunosuppressive
drugs within 30 days of starting this study.

12. Receipt of a live vaccine within past 4 weeks or a killed vaccine within past 2 weeks
prior to entry into the study.

13. History of a surgical splenectomy.

14. Receipt of blood products within the past 6 months.

15. Refusal to allow storage of samples for future research.