Measles cases in U.S. in 2026? is a active prediction market event on Polymarket with 9 markets, $7.6M total volume, and $35.9K in liquidity. Key markets: Will there be at least 5000 measles cases in the U.S. in 2026?; Will there be at least 1000 measles cases in the U.S. in 2026?; Will there be at least 2000 measles cases in the U.S. in 2026?.