If you're holding out on getting your child vaccinated for the flu because of an egg allergy, you might not need to! In general, almost all egg-allergic patients can receive the vaccine, after evaluation by an allergist.
Most flu vaccines contain a small amount of egg protein. There is sometimes anxiety about administering the flu vaccine to people who are allergic to egg, especially children and pregnant women. Some primary care providers prefer not to give the vaccine in these cases.