L.D. 471 sought to improve vaccination rates among Maine children by requiring parents to consult with doctors before withholding vaccinations from their children for philosophical reasons.

The bill initially passed in the House and Senate on June 18, but was then vetoed by Governor LePage. The roll-call vote displayed below, taken on June 30, portrays the results of a vote to override Governor LePage's veto. The effort to override the veto failed, coming up short of the necessary two-thirds majority by 5 votes.