Two resources to check out are www.cogforlife.org and www.onemoresoul.org.
You'll probably be surprised to find these are Catholic sites, while the Church overall supports and encourages vaccinations, it isn't supportive of the conditions in which they are currently being administered in the U.S.
You'll find as you read them that this is a big deal with Catholics for many reasons, including preserving parental rights (which the Church teaches is an inherent God-given right) in regard to whether a parent can choose whether to vaccinate vs. a school district demanding that they vaccinate.
The second reason you may or may not be aware of is that Catholics do not support abortion (it goes against Church teaching), therefore, the Church recommends for Catholics who wish to remain in good standing to purposefully look for and attempt to use alternatives to the current vaccines for childhood diseases available in the US because they were formulated using fetal stem cell lines.
To remedy this issue the Church encourages parents to have their doctors special order vaccines from Europe that don't use these lines, or to file an exemption for religious reasons, and to lobby the pharmaceuticals to formulate non-stem cell versions of these vaccines. Unfortunately, there are some vaccines that do not have an alternative, but there are some companies that are working on finding an alternative.
One piece of information that may be helpful to you is that both sites provide information where to find doctors and clinics nationwide that support parental rights and therefore would be willing to help a parent sign a valid waiver form to be given to their school district. The "COG" site in particular lists which states have exemption laws, and what you need to do specifically to file one. Just go to the left column and click on "Vaccine Resources" to get started. On the onemoresoul.org site, click on "NFP Directory" to get to the list of clinics/docs nationwide.
The same clinics and doctors listed will also special order vaccines and administer them on a schedule to your request, just as long as they don't use fetal stem lines. Many foreign countries like France for instance produce what some medical experts say are safer vaccines than what are available in the U.S. (No mercury, no allergens, extra chemicals etc.) Many of these doctors and clinics would be willing to help you secure them. If you read the research on these sites regarding what's in these vaccines, you will also discover hard to find information and studies regarding chemicals linked to autism and other medical concerns such as severe allergies because many vaccines are egg based, for instance. So if you don't mind going to a Catholic doctor or a Catholic clinic these might be an option for you.
Hope this helps.