The Stanford-LPCH Vaccine Program is seeking adults for a seasonal flu vaccine research study. Licensed, FDA approved flu vaccines given. You must be 18-30 yrs old, in good health and would be interested in participating annually for next few years. Participants will be compensated. 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/clinical_trials.html For general information about participant rights, contact 1-866-680-2906.