Sorry to hijack!

Just a quick question. My DS, 12, is fully vaccinated. I never thought twice about not doing it. I now have DD, 6 weeks, and am finding myself leaning more towards not vaccinating. She did not have HepB at birth, we aren't in an at risk group.
I have looked at Michaels suggested schedule and it appeals to me, as I was contemplating delaying rather than completely choosing not to at all. My question is this, because I have DS at school and playing with his friends ra ra ra, is my DD at a higher risk of coming into contact with these diseases than a child with no other siblings in school etc?
I have been researching this topic so intensely as DF is keen to get her immunised but he is open to discussion on the topic.
It is just so hard to come to a decision.
I don't want to put my DD at risk, but I also don't want to introduce all those nasty things into her body if I don't have to - that is just my thoughts.
Now this is weird for me, as I work in a NNU and we vaccinate our babies and I used to be all for it, until I had DD, now I am not liking the idea at all!

Argh, if anyone has any ideas on what they think of my question, I would greatly appreciate any info.

Thanks!