I would endorse what Kathleen has said, because the benefits of these vaccines far outweigh any potential detriment.
Now, I don't know, maybe there are some children that are very sensitive to what happens to be in a vaccine, but it would be very difficult to tell before the fact. I think from a public health point of view, it clearly benefits the child to have the vaccine.
With respect to the thimerosal in vaccines, the studies and the reviews that have come out more recently would suggest that that compound really has not been a major player in the development of autism, which I believe is where you're perhaps coming from. Overall, vaccines are good for you.