At least 124 cases of measles have been reported in Texas since late January — marking the largest outbreak in the state in close to 30 years. The dozens of reported cases have mostly affected children,

The measles outbreak in rural West Texas has grown to 58 cases as of Tuesday, and eight people in neighboring eastern New Mexico also have been diagnosed with measles. Public health officials in New Mexico have said they suspect some of the state’s cases are linked to the Texas outbreak, but haven’t confirmed it.

The measles outbreak that began in West Texas is still growing, with exposures possible as far away as San Marcos and San Antonio.