Hi Tracy,
My husband and I have always received our flu shots (regular season flu, not swine flu) for many years and we feel that's why we haven't had the flu in so many years that I can't count!!
For our little boy (now 2 1/2 years old), we have always had him get the flu vaccine, too, although I make sure that his is "preservative-free" or "thimerosol (sp?)- free". Our pediatrician in Austin ONLY gives her patients these types of shots.
You need to ask your pediatrician if this is the case for his / her practice. The flu shot is one of the few remaining vaccines (perhaps the ONLY one) that can still contain thimerosol as a preservative, which has MERCURY in it!! So, it has to be specifically ordered as preservative free...
Although you didn't ask about the swine flu vaccine, I can tell you what our pediatrician said to us. She said that when it comes in, she will review what's in it and recommend to us whether or not it would be a good idea to give it to our toddler (or ourselves). She wants to review the ingredients to ensure there's no toxic substances in them, which are often used as preservatives.
I hope this helps!
D.