Vaccines do exactly what they claim to do. But, in every decision you make, there will always be pros and cons. Pretending like there is only one or the other, is not helpful in making a good choice. Unfortunately in the vaccine argument, many if not most people adhere dogmatically to their own side, fooling themselves into thinking there are only pros. I have attached this article for you to consider for your pros and cons list.
I think most of the disagreement comes from placing different values on the cons or ignoring them completely. What one person views as unacceptable is different than another. I find this article fascinating.
Click the link below to read the article.