---
title: "Measles cases in U.S. by October 31?"
canonical_url: https://betcrypto.now/events/measles-cases-in-us-by-october-31
status: live
trading_closes_at: 2026-11-01T03:59:00+00:00
total_volume_usd: 11537.74
venues: ["Polymarket"]
categories: ["Tech & Science"]
prices_as_of: 2026-10-09T13:16:27+00:00
publisher: BetCrypto
data_api: https://betcrypto.now/api/v1/events/measles-cases-in-us-by-october-31
---

# Measles cases in U.S. by October 31?

Live · $11,538 traded · listed on Polymarket

## About

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 by October 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 'Total Cases' in 2026 (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.

_From Polymarket's listing._

## 3900+

| Outcome | Probability | Cheapest | Polymarket |
|---|---|---|---|
| Yes | 98% | 98¢ on Polymarket | 98¢ |
| No | — | 4.5¢ on Polymarket | 4.5¢ |

## Other markets

- 3700+ — 2 outcomes
- 4100+ — 2 outcomes
- 4200+ — 2 outcomes
- 4300+ — 2 outcomes
- 4700+ — 2 outcomes
- 4500+ — 2 outcomes
- 4800+ — 2 outcomes
- 4900+ — 2 outcomes
- 3800+ — 2 outcomes
- 4000+ — 2 outcomes

_Every market's prices are on the event page._

## Open on a venue

- [Polymarket](https://betcrypto.now/go/e/669350?via=md)

---

Probability is the cross-venue consensus (book midpoints, 0–100%). Venue columns are what buying costs there (the ask). Prices move constantly; re-check at the canonical URL or https://betcrypto.now/api/v1/events/measles-cases-in-us-by-october-31.

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