Will there be at least 5000 measles cases in the U.S. in 2026?

Prediction markets put the probability at 12%: Will there be at least 5000 measles cases in the U.S. in 2026. Currently, markets see this as unlikely (12% YES). Maricopa County confirms 3 new measles cases; likely infected locally.

What’s Happening

The question of whether there be at least 5000 measles cases in the U.S. in 2026 has gained renewed attention as outbreaks expand across multiple states. Maricopa County confirmed three new measles cases on May 6, 2026, bringing the county's 2026 total to 13 cases, with health officials noting the patients had no known travel or exposure source — indicating local community transmission. The Maricopa County Department of Public Health released a list of possible exposure sites across the East Valley, signaling concern about further spread within Arizona. [AZ Family, May 06]

The geographic spread continues to widen along the East Coast. On May 5, 2026, Nassau County, New York confirmed its first measles case since 2024 in an unvaccinated child, while New York City reported its fifth case of the year in a Manhattan resident who visited the restaurant Norma in Hell's Kitchen on April 25. Earlier, on May 2, Washington D.C. and Virginia health officials warned of possible exposure at Dulles International Airport and multiple Metrorail lines between April 23-27. New Jersey also reported its first 2026 case, broadening the cluster across the mid-Atlantic corridor. [NBC New York, May 05]

Whether there be at least 5000 measles cases in the U.S. in 2026 depends on whether localized clusters escalate into sustained community transmission. NYC health officials notified multiple Manhattan restaurants, a performance venue, and health care facilities about potential exposures, though spokesperson Chantal Gomez stated the risk to the general public remains low due to high vaccination coverage among New Yorkers. The CDC monitors weekly case counts, with the threshold of 5,000 cases requiring a substantial acceleration above current trajectories. Public health authorities are tracking unvaccinated populations and exposure chains in Arizona, New York, Virginia, D.C., and New Jersey as the determining factors for the remainder of 2026. [Gothamist, May 06]

Traded on Polymarket — $216K Volume

Polymarket prices this at 16c YES with $216K in volume. Moderate liquidity — use limit orders for positions above $1K to avoid moving the price.