A measles outbreak in West Texas has topped 120 cases and resulted in the first U.S. death from the illness in a decade.

The first measles death in the growing outbreak in West Texas was a school-aged child. The child was unvaccinated and had been hospitalized in Lubbock, Texas, said Lauren Adams, Lubbock city spokesperson. This is the first US measles death since 2015, when a woman in Washington state died.

The first person known to have died from measles in the U.S. in a decade was announced by health officials on Wednesday and described as a "school-aged child" who perished in a children's hospital in West Texas,