The measles outbreak in rural West Texas has grown to 58 cases as of Tuesday. Eight people in neighboring eastern New Mexico also have been diagnosed with the highly contagious disease.

At least 58 cases of measles have been reported in West Texas within the last three weeks — marking the largest outbreak in the state in close to 30 years. The dozens of reported cases have mostly affected children,

Additional measles cases "are likely to occur" as an outbreak of the virus grows, the Texas Department of State Health Services said in its latest update.