one of 20 one of 20 exemptions 19 states one of 20 one of 20 one of 20 one of 20 one of 20 19 states 19 states that allow philosophical exemptions one of 20 19 states that allow philosophical exemptions one of 20 one of 20 already allows both religious and philosophical exemptions one of 20 one of 20 one of 20 exemptions for religious beliefs one of 20 exemptions one of 20 required Close to 20 states one of 20 one of 20 philosophical objection one of 20 one of 20 one of 20 required required allow this article and map 19 states Other states one of 20 18 states one of 20 one of 19 states one of 20 required this article and map exemptions for religious or personal beliefs one of 20 one of 20 forty-eight states forty-eight states one of 20 exemption policies one of 20 one of 20 allows parents to opt out of immunizations one of 20 one of 20 one of 20 one of 20 one of 20 according to the National Conference of State Legislatures allows parents to opt out of immunizations one of 20 one of 20 also allow an exemption 19 states one of 20 one of 20 There are a range of policies among the states one of 20 one of 20 exemptions one of 20 individual state exemption laws philosophical exemptions one of 20 one of 20 Mississippi and West Virginia one of 20 one of 20 one of 20 individual state exemption laws exemptions for religious beliefs one of 20 exemptions forty-eight states one of 20 allows parents to opt out of immunizations one of 20 philosophical objection states one of 20 one of 20 Nineteen states one of 20 one of 20 is now one of 20 one of 19 states one of 20 states one of 20 one of 20 one of 20