Here is a handy chart to show that anti-vaccine parents, encouraged by home birth midwives, have led to a historic increase in measles in the united states. It is no surprise that the Utah outbreak, which primarily affects unvaccinated people, has its origins in Orem, the home of the largest Utah out-of-hospital birth center.
If you are reading this and have not gotten an MMR vaccine for you children yet- please reconsider. Your decision affects people who cannot obtain vaccines for various reasons, and the public at large. Forbes magazine is even discussing the possibility of suing parents who pass vaccine preventable diseases onto other humans. Be careful.