But, there again, its not just about you and your child. If your child is enrolled in preschool, its about all of the children enrolled.
I vaccinate my kids for most things, flu vax being one of two exceptions. I'm generally a big fan of vaccination.
But I entirely support the right of people do make their own decision about the matter. If you think you could be harming your kid, you shouldn't be forced to have them injected for the sake of other people.
And I've been immunocompromised myself for a significant period of time.