The Texas health department said on Friday that the number of measles cases in the state rose 20% since its last report three days ago, as experts warn they expect the outbreak to further spread in coming weeks.

The measles outbreak that began in the South Plains region surged to 400 cases across Texas on Friday, with dozens more reported in New Mexico and Oklahoma. The latest update from the Texas Department of State Health Services added 73 infections,

The US has more measles cases this year than in all of 2024, the CDC said last week. Here’s what else you need to know about the outbreaks.