An unvaccinated child has died from measles in West Texas, officials said, marking the first fatality from the disease in the U.S. since 2015. The Texas Department of State Health Services (DSHS) confirmed the death on Wednesday but did not disclose the patient's age.

The measles outbreak in rural West Texas has grown to 124 cases across nine counties. There are also nine measles cases in eastern New Mexico.

A child who was not vaccinated has died from measles in West Texas, the first death in an outbreak that began late last month and the first from measles in the U.S. since 2015.