If the bird flu should ever mutate to transfer amongst humans I would not want to rely on a flu vaccine. Flu vaccine notoriously does not work. I have observed medical workers as well as paitents who had the flu vaccine get the flu time and again. The best defense against any flu is a strong immune sytem and the correct medicine. If you want to be prepared for a killer flu learn about ozone therapy and Nutrisilver. Visit my blog. www.HealthSalon.org