What's the difference if it's already dead?? Its cells. If it will stop my baby getting whooping cough, who is ALIVE, then I will take that.
Also not all 'aborted' babies are aborted because they aren't wanted. Some are spontaniously aborted, others need to be aborted for medical reasons.
You make immunising seem bad when you say it all like that, which it isn't.
If I had to abort my baby, I would prefer his cells go to keeping other children healthy and stopping these horrible diseases from circulating.

And no I have nothing against not immunising.