When Texas officials first discovered measles cases this year, they were among the Mennonite population. Now, officials say cases are spreading to other communities.

The outbreak has expanded beyond West Texas and the Panhandle with confirmed cases in Erath County, southwest of Fort Worth, and Brown County, between Abilene and Killeen. Lamar County in far northeast Texas has 10 cases. Officials say 42 people have been hospitalized.

But there's a silver lining, officials say: More people have received a measles, mumps and rubella vaccination this year in Texas and New Mexico, which also has an outbreak, compared to last year — even if it's not as high as they would like. And pharmacies across the U.S., especially in Texas, are seeing more demand for MMR shots.