Do you have a healthy child 6 months - 13 years old? Would you like to participate in a research study of the immune responses to the standard seasonal flu vaccine? Your support could help develop a more effective vaccine in the future. Each child will receive the current FDA-licensed flu vaccine plus $30 compensation for each of the 2-4 clinic visits completed. A small blood sample or nasal swab may be collected at some visits. For more information contact Stanford-LPCH Vaccine Program: 650-498-7284 vaccines_program@stanford.edu http://vaccines.stanford.edu For general information about participant rights, contact 1-866-680-2906