Allergies & the Flu Shot
Being as the flu vaccine is made in eggs, egg proteins (primarily ovalbumin) are present in the final product. The small amount of egg proteins found in the influenza vaccine—about 0.02 to 1.0 micrograms per dose—is, however, sufficient to induce severe and, rarely, fatal reactions in children with egg allergies. For this reason, protocols have been developed to administer influenza vaccine safely to children with severe egg allergies. You should consult your pediatrician for more information.
Additional information can be found on the Centers for Disease Control and Prevention's influenza Web site.