The Mennonite population being affected by a measles outbreak in West Texas is part of a larger, loosely affiliated group of churches worldwide.

The measles outbreak in West Texas has risen to 124 cases across nine counties, the worst outbreak in the state in over 30 years. The majority of the cases center on the Mennonite communities, where many of the children are “undervaccinated,” state health department spokesperson Lara Anton said.

Now 124 people infected in West Texas, nine more in New Mexico and outbreak 'still has a lot of energy and steam behind it.'