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,

The measles outbreak in Texas has escalated sharply to 90 cases as health officials worry about the spread to more communities.

Health officials expect a measles outbreak in West Texas to exceed 100 cases because of low vaccine rates and undetected infections. Vaccine misinformation and new laws may make such situations more common and harder to contain.