It doesn't matter, kids remain kids to parents even when they are grown and our worries about them change, but never disappear.It seems to me that the majority of people in the group are people with no kids or kids that are grown.
I understand your concerns, christaletoile, but I think the right approach to this dilemma is the best way forward.
We can't say with certainty if supplements will cure us of every evil hidden in those vaccines, but then it's not a magical cure. If we think that, we are mistaken. They do however help our immune system become stronger. Assuming you have been reading here for quite some time you know that there is no free lunch!
First and foremost, I think we ourselves are responsible for our own thoughts, emotions and actions, which if we don't know how to deal with them in a constructive manner will affect our children and that may even be worse than the vaccine (I am not saying you are doing that, this is a general observation).
I don't know how old your children you are, but I wouldn't bother them with unnecessary information which may only upset them (I made that mistake in the past.) So, I wouldn't talk about implants and so on. And, I would set an example for my kids and show them that I can handle these times with equanimity and that in itself will give your kids a beacon to look to, even when the going gets rough(er) and that will also help them face whatever comes their way.