>> narrator: but vaccine watchdogs like barbara loe fisher oppose such legislative attempts to limitarental choice, turning again to the internet. >> the battle lines are clearly drawn. now americans have a choice to make. will we stand up and fight to protect our freedom to make voluntary decisions about which vaccines we buy and use, or will we permit liability-free drug companies and government health officials to take that freedom from us? >> madame chair and members of the committee, thank you. >> narrator: jennifer margulis has also joined the fight, testifying against a new oregon bill to ban personal belief exemptions. >> for me this is a debate about freedom and parental choice. oregon should be educating parents about vaccines and vaccine safety. there is no place for forced vaccination in a free society. >> thank you. >> narrator: and some politicians are being asked to weigh in on this divisive issue. >> parents need to have some measure of choice in things as well. so that's the balance that the government has to decide. >> did you really just say that you think most vac