Measles cases in the United States are continuing to rise with national infections more than 4.5 times higher than the entirety of last year, CDC data shows.

Dropping vaccination rates and changes in U.S. vaccine policy have public health experts concerned that annual measles outbreaks could become more frequent.

Infectious diseases that the U.S. had conquered decades ago — thanks to highly effective vaccines — are surging again, due to an uptick in vaccine avoidance. In 2025, three people have died and 162 ...