As of the latest CDC data through May 7, 2026, the United States has recorded 1,842 confirmed measles cases year-to-date across 39 jurisdictions, with 25 new outbreaks fueled by declining MMR vaccination coverage—now at 92.5% among kindergarteners nationally, below the 95% herd immunity threshold—and importations from global hotspots. Over 92% of cases occurred in unvaccinated or unknown-status individuals, primarily in states like South Carolina (669 cases), Utah (439), and Texas (182), with recent weekly reports showing a slowdown to just seven cases ending May 3 amid containment efforts. Transmission remains highly efficient in low-vaccination pockets, with 6% hospitalization rate but no fatalities. Traders should watch weekly CDC surveillance updates and summer travel surges, as ongoing chains could push totals higher before the November elimination status review.