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Story summary
- CDC reported 2,318 measles cases in the United States through July 23, 2026, surpassing 2025 totals.
- Officials say vaccine hesitancy and under-vaccination drive the surge, with most patients unvaccinated, many children.
- South Carolina recorded the largest outbreak, reporting 997 cases.
- CDC maps show many states’ kindergarten vaccination rates fall below the 95 % herd-immunity threshold, straining contact-tracing staff cut by funding reductions.
