Sustained measles transmission driven by vaccination gaps below the 95% herd immunity threshold continues to fuel record U.S. case counts in 2026. As of August 13, the CDC reports 2,566 confirmed cases—already exceeding the full-year 2025 total of 2,289 and marking the highest annual figure since 1991—with 38 new outbreaks and 94% of infections outbreak-associated across 47 jurisdictions. Most cases involve unvaccinated individuals, including 20% under age 5, reflecting imported introductions and local chains in under-immunized communities. CDC weekly updates and state surveillance reports will shape trader views on whether totals remain elevated through year-end, while any Pan American Health Organization review of elimination status could highlight ongoing risks from declining routine MMR coverage.
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. in 2026?
$7,830,948 Vol.
$7,830,948 Vol.
↑4.5k
42%
↑3k
95%
↑3.5k
92%
↑4k
75%
↑5k
26%
↑7.5k
12%
↑10k
6%
↑12.5k
5%
$7,830,948 Vol.
$7,830,948 Vol.
↑4.5k
42%
↑3k
95%
↑3.5k
92%
↑4k
75%
↑5k
26%
↑7.5k
12%
↑10k
6%
↑12.5k
5%
The resolution source for this market will be the CDC Measles (Rubeola) counter (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: Feb 16, 2026, 11:51 AM ET
Resolver
0x65070BE91...The resolution source for this market will be the CDC Measles (Rubeola) counter (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 vaccination gaps below the 95% herd immunity threshold continues to fuel record U.S. case counts in 2026. As of August 13, the CDC reports 2,566 confirmed cases—already exceeding the full-year 2025 total of 2,289 and marking the highest annual figure since 1991—with 38 new outbreaks and 94% of infections outbreak-associated across 47 jurisdictions. Most cases involve unvaccinated individuals, including 20% under age 5, reflecting imported introductions and local chains in under-immunized communities. CDC weekly updates and state surveillance reports will shape trader views on whether totals remain elevated through year-end, while any Pan American Health Organization review of elimination status could highlight ongoing risks from declining routine MMR coverage.
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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