Texas reported 90 cases this week, while New Mexico reported nine. A majority of the cases have been in a Texas county where vaccination rates have lagged behind the rest of the state.

A record-breaking outbreak of measles continues to worsen in western Texas — and has now spread over the border into eastern New Mexico, according to health officials. Cases of the highly contagious respiratory virus in the Long Star State have climbed to 90 as of Friday — nearly double what they were one week ago,