Hi - the whole vaccine issue is a tough one, but I think it's great that you are at least questioning it. Personally, we didn't vaccinate our baby at all, so my personal advice would be against giving your two-year-old the flu vaccine. For me, there are many reasons... first being that I don't believe that what goes into vaccines is researched enough nor do I trust our government to make sure they're safe. Not to mention that there is room for human error during the process of making, distributing and/or giving the vaccine. You might remember reading about a major recall recently because of contaminated vaccines. Secondly, I believe that there is a fair amount of risk in preventative medicine that involves chemicals being directly injected to a baby or toddler's bloodstream. It seems to me that a strong immune system needs a clean, non-polluted body in order to work at its peak performance. This is especially true in a baby (or toddler) whose immune system is just being built, so to speak. So, to me, giving a flu vaccine undermines an already amazing system that was built for keeping us healthy.
I can understand why your pediatrician wants to keep your 2-year-old away from colds and flus, but she is ASSUMING that IF he got anything, it would go directly to his respiratory system and there is really no way of knowing that, nor do I believe that's there's anything that would point to that happening. My gut reaction was that if your son had some respiratory issues, the last thing he needs is chemicals in there polluting him as a prevention based of your doctor's fear and assumptions.
I found an article in Parenting Magazine (Oct. 2007) recently, that I saved for a friend who was questioning the very same thing. Here's what it said...
"Need-to-know info from The Vaccine Book: Making the Right Decision for Your Child, by Robert Sears, MD... - Most flu shots in use today still contain some mercury. If you're concerned about this, be sure your doc doesn't use Fluzone from a ten-dose vial (it contains by far the largest concentration). The brand's single doses are mercury-free, as is FluMist. The other two shots, Fluarix and Fluvirin, contain miniscule amounts. Fewer than 50 children under 5 die from flu complications each year, according to the American Lung Association. Your child's flu shot is usually more about avoiding a really uncomfortable week - and preventing the flu from spreading to seniors, who are most vulnerable. If you breastfeed and don't work outside the house, ask your doctor if your baby really needs the shot. Nursing boosts her immunity and you'll bring home fewer germs."
I hope that info. helps. Good luck with finding the answer that feels right to YOU :)