As of early August 2026, the CDC has confirmed 2,465 measles cases nationwide, already exceeding the full-year 2025 total of 2,289 and marking the highest annual count since 1991, with 38 new outbreaks reported and 94% of cases linked to ongoing transmission clusters. Declining MMR vaccination coverage, particularly in under-immunized communities, remains the dominant driver sustaining community spread, as over 90% of cases involve unvaccinated individuals. Official surveillance data show continued weekly additions, and traders are monitoring CDC’s routine updates alongside an imminent review of U.S. measles elimination status by the agency’s advisory committee. With roughly four months remaining in the calendar year, further model projections of incidence and any shifts in state-level reporting thresholds could materially influence final tallies.