Skip to content
WhaleSays

Measles cases in U.S. in 2026 odds

The most likely target still in play is “Will there be at least 5000 measles cases in the U.S. in 2026?”, which Polymarket traders price at 98% (unchanged in the last 24 hours), followed by “↑4.75k” at 98%.

Prices refresh every few minutes. Probabilities are not predictions or advice, and you can lose what you trade.

Probability over the last 30 days

The top 4 outcomes right now.

Sep 26Oct 25
↑5k↑4.75k↑5.5k↑6k

All 9 outcomes and their odds

Probability is the share price. Decimal odds show what $1 returns if that outcome wins, before fees. American odds show the same price as a moneyline: +150 pays $150 on a $100 stake, −200 needs $200 to win $100.

Odds as of

Where this market stands

“Measles cases in U.S. in 2026” is a Polymarket event with 9 open outcomes. The likeliest target still in play is ↑5k at 98%, ahead of ↑4.75k at 98%; ↑5k is unchanged over the last 24 hours and up 0.5 points over the past week. Traders have put $8.2M through the event so far, including $1,855 in the last 24 hours, and it is scheduled to end on January 1, 2027.

Whale trades in this market

The latest trades of $1,000 or more on this event, newest first.

All whale trades

How this market resolves

This market will resolve to "Yes" if there have been the specified amount or more confirmed cases of Measles (Rubeola) in humans in the territory of the United States of America in 2026 according to the CDC case counter between January 1, 2026, 12:00 AM ET and December 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to "No".

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.

Rules are written by Polymarket and shown as published. WhaleSays does not settle markets.

Common questions

New to this? Our guide covers how to make your first trade.

Which outcome is most likely in Measles cases in U.S. in 2026?
Among the targets still in play, the highest probabilities are: ↑5k (98%), ↑4.75k (98%), ↑5.5k (90%). Each target is a separate market that resolves Yes if the price is touched.
Will there be at least 5000 measles cases in the U.S. in 2026?
Polymarket currently prices Yes at 98%, which is decimal odds of 1.02 (American −6150): $1 staked on Yes returns about $1.02 if the target is hit, before fees. In the last 24 hours the price moved by less than 0.1 points.