The U.S. has already surpassed last year’s number of measles cases. Here’s what’s driving the surge.

The number of measles cases reported in the United States so far this year has surpassed the total recorded in all of 2025, a mid-year milestone that shows the difficulty of containing the highly contagious disease amid increasing vaccine hesitancy and misinformation. Johns Hopkins University released data that shows 2,295 cases have been reported as…