6. Medications under investigation The FluMist® vaccine made by AstraZeneca will be provided and routed to Ste-Justine Hospital by the National Institute of Public Health under the specific storage conditions set by the manufacturer. The vaccines will be under the conditions required by the manufacturer in the Ste-Justine research center, under the responsibility of the principal investigator. The Ste-Justine research center is equipped with a refrigerator with temperature control monitors, allowing for verification of all changes in temperature which can then be reported to the principal investigator. Vaccines will be stored in a safe and secure environment. Information pertaining to the arrival of the vaccines, the doses administered and the return or destruction (if warranted) of the vaccines will be documented.