This is a good video and review of a book about vaccination. you might be interested.
also, as i understand it, vaccines don't have to be riddled with chemicals. there are different ways to vaccinate, and some vaccines are only biological in nature, in fact traditional vaccines where like that. allthough I dont know if you'll find vaccines like that today. A Friend of mine, who has a company selling bio-chemicals did tell me about it. sadly, we didn't go into details about it.
Thanks for the video. I'm part way through and will watch the rest later today. Seems good so far.