James Filenbaum is a New York attorney and author of the article "Your Right to Avoid Immunizations." He specializes in religious and philosophical exemptions to vaccination. Some state statutes require a parent to be a member of a specific organization to claim a religious exemption, but Filenbaum said that such a requirement has been declared unconstitutional. All states provide medical exemptions, and all but two states, Mississippi and West Virginia, also have religious exemptions. Currently 15 states provide for philosophical exemptions. "A lot of people, including school officials, may tell you that that is still the law, but it is not the law. It changed in 1988 when we brought a case in New York for a chiropractor who didn't want his child vaccinated. As a result of that case, the court declared the law unconstitutional because it discriminates between people based on their religious beliefs....When a school district denies you your right to claim a religious exemption, they are violating your federally protected civil rights under the first amendment....And under federal law you are entitled to financial damages."
http://www.hpakids.org/holistic-health/articles/187/1/Vaccine-Conference-Exclusive-Report