Ongoing measles transmission in under-vaccinated communities continues to drive U.S. case counts sharply higher, with the CDC reporting 3,134 confirmed cases through early September 2026—already surpassing the full-year 2025 total of 2,289 and marking the highest annual figure since 1991. Approximately 94% of infections involve individuals who are unvaccinated or whose status is unknown, with the majority occurring in children and young adults amid multiple active outbreaks, particularly in Pennsylvania and other states. Official surveillance shows about 8% of cases result in hospitalization, while nearly all remain domestically acquired. Weekly CDC updates through late September will provide the latest case tallies and outbreak details that directly inform market resolution, as transmission patterns remain sensitive to community immunity levels and any new clusters.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedMeasles cases in U.S. by September 30?
3200+
99%
3300+
97%
3400+
91%
3500+
83%
$6,167 Vol.
3200+
99%
3300+
97%
3400+
91%
3500+
83%
The resolution source for this market will be the CDC Measles (Rubeola) counter 'Total Cases' in 2026 (see: https://www.cdc.gov/measles/data-research/index.html) at the resolution time. If the counter becomes unavailable, another credible source will be used.
Note: Only cases reported by the CDC Measles (Rubeola) counter will qualify, regardless of reports from U.S. State agencies or other sources.
Market Opened: Aug 26, 2026, 5:27 AM ET
Resolver
0x65070BE91...The resolution source for this market will be the CDC Measles (Rubeola) counter 'Total Cases' in 2026 (see: https://www.cdc.gov/measles/data-research/index.html) at the resolution time. If the counter becomes unavailable, another credible source will be used.
Note: Only cases reported by the CDC Measles (Rubeola) counter will qualify, regardless of reports from U.S. State agencies or other sources.
Resolver
0x65070BE91...Ongoing measles transmission in under-vaccinated communities continues to drive U.S. case counts sharply higher, with the CDC reporting 3,134 confirmed cases through early September 2026—already surpassing the full-year 2025 total of 2,289 and marking the highest annual figure since 1991. Approximately 94% of infections involve individuals who are unvaccinated or whose status is unknown, with the majority occurring in children and young adults amid multiple active outbreaks, particularly in Pennsylvania and other states. Official surveillance shows about 8% of cases result in hospitalization, while nearly all remain domestically acquired. Weekly CDC updates through late September will provide the latest case tallies and outbreak details that directly inform market resolution, as transmission patterns remain sensitive to community immunity levels and any new clusters.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated

Beware of external links.
Beware of external links.
Frequently Asked Questions