Texas, Oklahoma and New Mexico reported new measles cases this week, with the outbreak expanding for the first time into central Texas. Already, the U.S. has more measles cases this year than in all of 2024, the CDC says. The multi-state outbreak confirms health experts' fears that the virus will take hold in other U.S. communities with low vaccination rates and that the spread could stretch on for a year. The WHO said last week that cases in Mexico are linked to the Texas outbreak.