A measles outbreak in Texas has infected over 250 people as of Friday, as cases of the highly contagious illness have been spotted in 15 states and already exceeded the total number of measles cases reported in 2024.

The Texas health department reported 259 measles cases in the state on Friday, an increase of 36 cases from its previous count on March 11, as one of the largest outbreaks the U.S. has seen in the last decade spreads.