Seeking 18-30 year olds! 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 did not get a flu vaccination last year. 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.