Public health authorities said Tuesday that an outbreak of measles in western Texas has expanded, while a new case was confirmed nearby across state lines in New Mexico.

With hospitalizations and at least a dozen cases, health officials race to contain a growing outbreak in a community with low vaccination.

The outbreak in Gaines County, with a population of about 22,000, has grown since two cases were reported in January. All those who contracted measles were unvaccinated, health officials said.

A small county in West Texas has 15 measles cases, mostly in school-aged children. Gaines County, which borders New Mexico, has one of the highest rates of vaccine exemptions in the state.

Health officials in Texas are battling a growing measles outbreak in an area that has some of the state's lowest vaccination rates and highest non-medical exemptions. On January 30, officials reported two measles cases in unvaccinated,