I went back and forth about immunizations before we decided to have my son's done. We did eventually agree to have his immunizations done on schedule, and for a few reasons:
1. Among the major issues with vaccinations is the autism connection. BUT: not one single established medical authority agrees that there is a link. The AAP, the WHO, both state that this is false. Additionally, the ingredient believed to cause the probloem wasa preservative named Thimerosal, which metabolizes into mercury in the body, the theory goes. However, Thimerosal has been out of U.S vaccinations for several years, so no problem there.
2. School is an issue, in some places. We are attending a Mommy and Me program this year that will not take children who have not been vaccinated. While it's not life or death over this, I wouldn't want him to miss out on certain opportunities because we hadn't made sure he had his shots. Private colleges and univerities are also allowed to do this, religious objection or not. They aren't subject to the same kind of tolerance laws, because so many are either run by or affiliated with religious bodies.
3. Vaccines exist for a reason. We vaccinate against diseases where kids DIE. I'm not willing to take that kind of chance, regardless of the statistical odds, hoping that his immune system will be stronger in the end IF he lives through the disease. While it is rare in the overall population, 80% of deaths from chicken pox occurs in people under 30. For me, even one is enough of an example why I needed to do this for him.
If you want to do some research, check out this website which breaks down both the benefits and the risks of vaccinations, and answers a lot of questions on why it's important, exactly how a vaccine works, and a history of the development of the vaccination schedule. It's important to see both side of the story before you make a decision. Good luck!
http://www.cdc.gov/nip/menus/vaccines.htm#varicella