Parents who want to maintain the right to refuse vaccinations for their children are mounting a strong fight against an Oregon bill that takes aim at the state’s highest-in-the-nation rate of non-medical vaccine exemptions. Oregon considers bill banning most vaccine exemptions Parents who want to maintain the right to refuse vaccinations for their children are mounting a strong fight against an Oregon bill that takes aim at the state’s highest-in-the-nation rate of non-medical vaccine exemptions.