The Stanford-LPCH Vaccine Program is seeking adults for a flu vaccine research study. You must be 18-70 yrs old and in good health. Participants will need to come in for an initial screening and will be compensated for each of 6-7 clinic visits. Participants will receive two study vaccinations. For more information about these or other vaccination studies at the Stanford-LPCH Vaccine Program, call 650-498-7284 or visit our website at: http://vaccines.stanford.edu. For general information about participant rights, contact 1-866-680-2906.