Will there be 1520+ measles cases in the U.S. on September 30?Will there be between 1510 and 1519 measles cases in the U.S. on September 30?Will there be between 1490 and 1499 measles cases in the U.S. on September 30?Will there be between 1500 and 1509 measles cases in the U.S. on September 30?Will there be fewer than 1480 measles cases in the U.S. on September 30?Will there be between 1480 and 1489 measles cases in the U.S. on September 30?This market will resolve according to the number of confirmed cases of Measles (Rubeola) in humans in the territory of the United States of America in 2025, according to the CDC case counter on September 30, 2025, 11:59 PM ET. 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.
Polymarket uses a central limit order book (CLOB) model β you can buy or sell shares of any outcome at the current market price, or place limit orders. Prices represent implied probability: a $0.65 contract means the market prices a 65% chance of that outcome.