The news on Wednesday that a Texas child died from the measles is a sign the outbreak that has already infected 124 is dangerous, Dr. Peter Hotez said.

LUBBOCK, Texas — 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.

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.