(Seattle, WA) -- Washington state lawmakers are moving forward with a bill limiting non-medical exemptions to the measles vaccine. The Washington House voted 57 to 70 earlier this week in favor of HB 1638. The bill now moves to the state Senate. HB 1638 would put an end to personal or philosophical exemptions from measles vaccination for school-age children. A measles outbreak in southwestern Washington state has sickened more than 70 people in that state and at least four people in Multnomah County since the start of the year.