**Sustained measles transmission driven by declining MMR vaccination coverage continues to push 2026 U.S. case counts far above historical norms.** As of August 20, the CDC reported 2,777 confirmed cases across 47 jurisdictions, with 94% linked to 36 outbreaks (many persisting from 2025) and 94% occurring in unvaccinated or unknown-status individuals. Recent weekly additions reached 211 cases, concentrated in hotspots like Pennsylvania and Ohio, alongside the first 2026 deaths in Pennsylvania. Primary factors include sub-95% kindergarten MMR rates in multiple states and ongoing local chains of the highly contagious virus. CDC weekly updates through late September, plus any school-year surveillance spikes, will determine the final tally before the September 30 resolution. Trader consensus reflects the strong upward trajectory from current official counts and transmission patterns.
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?
2900+
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$2,211 Vol.
2900+
100%
3000+
96%
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76%
3200+
75%
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 24, 2026, 11:00 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...**Sustained measles transmission driven by declining MMR vaccination coverage continues to push 2026 U.S. case counts far above historical norms.** As of August 20, the CDC reported 2,777 confirmed cases across 47 jurisdictions, with 94% linked to 36 outbreaks (many persisting from 2025) and 94% occurring in unvaccinated or unknown-status individuals. Recent weekly additions reached 211 cases, concentrated in hotspots like Pennsylvania and Ohio, alongside the first 2026 deaths in Pennsylvania. Primary factors include sub-95% kindergarten MMR rates in multiple states and ongoing local chains of the highly contagious virus. CDC weekly updates through late September, plus any school-year surveillance spikes, will determine the final tally before the September 30 resolution. Trader consensus reflects the strong upward trajectory from current official counts and transmission patterns.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated

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