An outbreak of measles in Texas has infected 124 people so far — 18 of whom have subsequently been hospitalized and one who has died.

An unvaccinated child in west Texas died from measles this week, according to a Wednesday news release from the Texas Department of State Health Services. This is the first death from the west Texas measles outbreak that began late last month, and is the first death from measles in the United States since 2015.