As of mid-August 2026, the CDC has confirmed 2,566 measles cases across 47 jurisdictions, already surpassing the full-year 2025 total of 2,289 and marking the highest annual count since 1991. This surge stems from sustained community transmission in under-vaccinated populations, with 94% of cases linked to 38 new outbreaks and many carrying over from late-2025 clusters; 20% involve children under five. Imported cases from international travel continue seeding local spread amid global measles activity. The CDC’s Advisory Committee on Immunization Practices is reviewing elimination status this month, while weekly case reports and state surveillance updates through year-end will determine final totals and any shifts in transmission dynamics.