As of early October 2026, CDC data show 3,887 confirmed U.S. measles cases this year across 47 jurisdictions, already far exceeding the 2025 total of 2,289 and marking the highest annual count since 1991. Sustained transmission stems primarily from record MMR vaccine exemptions—now 4.2% among kindergartners—creating clusters of susceptible individuals where 95% of cases are outbreak-linked and 95% occur in unvaccinated or unknown-status persons. Measles' high contagiousness (R0 of 12–18) sustains chains despite two-dose MMR efficacy near 97%. Weekly CDC surveillance updates and state reports on hospitalizations (currently ~9%) and any additional deaths will shape final totals through year-end.
Resumen experimental generado por IA con datos de Polymarket. Esto no es asesoramiento de trading y no influye en cómo se resuelve este mercado. · ActualizadoView resolved

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