As of August 6, 2026, the CDC has confirmed 2,465 measles cases in the United States for the year, already exceeding the full-year 2025 total of 2,289 and marking the highest annual count since 1991. This surge stems primarily from multiple ongoing outbreaks—38 new ones reported in 2026 alone—concentrated among unvaccinated individuals, with 94% of cases outbreak-associated and transmission persisting across at least 47 states. Declining childhood MMR vaccination rates have sustained community spread, raising the risk of further increases before the August 31 resolution date. Weekly CDC updates and state health department reports on new confirmations, particularly from active clusters in Pennsylvania and elsewhere, will provide the key data releases that could shift market-implied odds in the coming weeks.
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 August 31?
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98%
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$7,636 Vol.
2500+
98%
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94%
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86%
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: Jul 31, 2026, 12:30 PM 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...As of August 6, 2026, the CDC has confirmed 2,465 measles cases in the United States for the year, already exceeding the full-year 2025 total of 2,289 and marking the highest annual count since 1991. This surge stems primarily from multiple ongoing outbreaks—38 new ones reported in 2026 alone—concentrated among unvaccinated individuals, with 94% of cases outbreak-associated and transmission persisting across at least 47 states. Declining childhood MMR vaccination rates have sustained community spread, raising the risk of further increases before the August 31 resolution date. Weekly CDC updates and state health department reports on new confirmations, particularly from active clusters in Pennsylvania and elsewhere, will provide the key data releases that could shift market-implied odds in the coming weeks.
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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