Will there be at least 10000 measles cases in the U.S. in 2026?

As of September 2, 2026, Polymarket prices “Will there be at least 10000 measles cases in the U.S. in 2026?” at 5% YES with $6.5M traded. No tracked smart-money wallet holds a position on this market yet.

Prediction markets put the probability at 5%: Will there be at least 10000 measles cases in the U.S. in 2026. Currently, markets see this as unlikely (5% YES). Measles cases in 2026 are set to surpass last year's total.

What’s Happening

The United States has recorded its worst year for measles in more than three decades, with the U.S. Centers for Disease Control and Prevention logging 2,318 confirmed cases as of July 23, 2026, narrowly surpassing the 2,289 cases tallied in all of 2025. That earlier total was itself the highest in over 30 years, making the new milestone the largest annual count since 1991 — with more than five months of the year still remaining. A parallel Johns Hopkins University tracker, which compiles local and state health data, reported 2,295 cases as of July 22, closely matching the federal figure. [WaPo, Jul 21]

The surge matters because public health specialists warn the country is on track to lose the measles elimination status it earned in 2000, a designation defined by the absence of continuous domestic transmission for 12 months. Experts cited to ABC News several drivers behind the record, including declining childhood vaccination rates, clustered outbreaks in undervaccinated communities, and imported cases seeding local spread. The question of whether there be at least 10000 measles cases in the U.S. in 2026 hinges on whether these outbreaks continue compounding through the autumn school season rather than plateauing. [ABC News, Jul 17]

Reaching the threshold of whether there be at least 10000 measles cases in the U.S. in 2026 would require the confirmed count to more than quadruple from its late-July level within the year's final months, a pace far exceeding the roughly 2,300 cases accumulated over the first seven months. While the trajectory has been steep enough to break the 35-year record, no single reporting period in 2026 has approached the weekly volume implied by a five-figure annual total. Health authorities continue to monitor active outbreak clusters, and the CDC updates its national tally weekly as new state figures are confirmed. [Guardian, Jul 24]

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