The number of measles cases in the U.S. has increased significantly in the past two weeks, according to Johns Hopkins University data.

May 1, 2026. 2026 U.S. Measles Cases - Johns Hopkins (N=1023) (Appears to be more current than CDC's site) {https://publichealth.jhu.edu/ivac/resources/us-measles-tracker}

U.S. Measles Cases Past two weeks Apr 17, 2026 - May 1, 2026 (n=64) Johns Hopkins (Appears to be more current than CDC's site) {https://publichealth.jhu.edu/ivac/resources/us-measles-tracker}

May 1, 2026 Cumulative measles cases reported in the United States by year Johns Hopkins {https://publichealth.jhu.edu/ivac/resources/us-measles-tracker}