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No Ebola Case Confirmed in the US by June 30 | Lines.com

No Ebola Case Confirmed in the US by June 30 | Lines.com

SR Sofia Renard Climate & Science Analyst
Market Resolved
Embed this market
Resolution Verdict
NO (CONFIRMED) Market Resolved

Market has ended. Final implied probability: 0%.

Resolved
Volume
$328.2K
$3.7K in 24h
Liquidity
$40.8K
Moderate depth
7-Day Move
-3%
Stable
Time Left
Ended
Resolves Jun 30
328K Vol. Ended

No Ebola case was confirmed on US soil by June 30, 2026. The market resolved NO after a DRC-centered outbreak triggered CDC entry screening, travel restrictions, and diplomatic mobilization, none of which produced a domestic case. The data backed the outcome the market had been pricing for weeks.

Traders had moved this market from an 18% YES probability at open to roughly 0.1% at close. That convergence was not a surprise. The market priced uncertainty early, then corrected hard as CDC containment measures held. The $328,219 in total volume shows this market attracted serious attention despite the lopsided final price.

No US Case Confirmed Despite Active DRC Outbreak

An Ebola outbreak in the Democratic Republic of Congo spread into Uganda and neighboring South Sudan through the first half of 2026. The CDC confirmed that an American working in DRC, a Christian missionary affiliated with the international charity Serge, tested positive for Ebola in-country. That case never reached US soil. As of June 30, 2026, the CDC stated explicitly that no Ebola cases had been confirmed in the United States as a result of the outbreak.

The US government escalated containment measures throughout the window. On May 18, 2026, the CDC, the Department of Homeland Security, and other federal agencies implemented public health entry screening and entry restrictions covering travelers from DRC, Uganda, and South Sudan. An order continuing the suspension of entry for specified foreign nationals was issued June 21, 2026. Those measures held the line. No domestic transmission occurred.

The final probability at close was 0.1%, essentially zero. The market did not waver in the final weeks. Traders had priced this as a near-certain NO well before the June 30 deadline, and the confirmed outcome validated that positioning.

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How the Market Performed on This Ebola Prediction

The implied probability at article time was 0.1% YES. The market opened at 18% YES and collapsed from there as CDC containment infrastructure mobilized. That 18-point drop reflects a market correcting in real time as the public health response made domestic transmission increasingly unlikely. Traders priced the science, not the fear.

Total volume of $328,219 is substantial for a binary public health market. The $40,836 in liquidity supported clean price discovery throughout the window. The market assessed this correctly: the 18% early price reflected genuine early-window uncertainty about outbreak trajectory, while the collapse to near-zero tracked the effectiveness of border screening and entry restrictions in real time. Here is what the measurements are telling us: the market performed well once containment signals became readable.

  • Resolution Outcome: NO, no Ebola case confirmed in the United States by June 30, 2026.
  • Article-Time Probability: 0.1% YES, a market already settled in direction.
  • Final Price at Close: 0.1% YES (Yes=0.00, No=1.00).
  • Total Volume: $328,219, with $40,836 in supporting liquidity.
  • Market Assessment: Correctly priced NO. Early 18% reflected outbreak-phase uncertainty; systematic correction tracked CDC containment measures.

What the Ebola Market Resolution Means for Outbreak Monitoring

The DRC-Uganda outbreak remains active beyond June 30, 2026. The CDC has not lifted entry screening or travel restrictions as of the resolution date. US implementers including International Medical Corps and Medair continue to support over 100 health facilities in affected areas, with 41 suspected cases isolated across DRC’s Ituri Province as of early June. The outbreak is not over. The market question only covered US domestic risk through a specific date.

The binary structure of this market captured the right question but compressed a complex risk. Outbreak containment is not a yes-or-no event. The 18% peak price was a reasonable reading of early-outbreak uncertainty. The data doesn’t care about the politics: once CDC implemented systematic entry screening on May 18, the structural probability of a US case dropped sharply. A market with a rolling 90-day window might price ongoing risk differently as the DRC situation evolves.

  • The CDC entry restriction order issued June 21, 2026 remains in effect for 30 days, covering travel from DRC, Uganda, and South Sudan, meaning the containment framework extends into July.
  • US government implementers continue active surveillance across 24 health facilities in DRC’s Ituri Province, screening thousands of individuals for Ebola symptoms.
  • An American citizen tested positive for Ebola in DRC during the market window, demonstrating that exposure risk for US nationals abroad is real even as domestic risk stayed near zero.
  • Related markets show Hantavirus pandemic risk at 2% and measles US cases at 100%, illustrating that outbreak prediction markets span a wide risk spectrum, with Ebola sitting near the low end for domestic impact probability.

LINES RESOLUTION VERDICT

RESOLVED NO

The market correctly priced the absence of a US Ebola case: robust CDC containment, systematic entry screening, and travel restrictions held the line despite an active DRC outbreak that reached a US national abroad.

What the market showed: Implied probability was 0.1% at article time, down from an 18% open. The final price at close was 0.1% YES. The market correctly identified NO, with early uncertainty priced appropriately for the outbreak phase before containment signals drove a sustained collapse in YES probability.

Frequently Asked Questions

The market resolved NO on June 30, 2026. The CDC confirmed no Ebola cases were identified on US soil during the market window, despite an active outbreak in DRC, Uganda, and South Sudan.

Yes. Traders moved the YES probability from 18% at open to 0.1% at close, correctly anticipating that CDC entry screening and travel restrictions would prevent a domestic case.

The volume reflects genuine early-window uncertainty about the DRC outbreak's trajectory. Substantial participation shows traders took the public health risk seriously before containment measures clarified the outcome.

The DRC outbreak remains active beyond June 30. CDC travel restrictions and entry screening covering DRC, Uganda, and South Sudan continue. Domestic risk stays low but the outbreak is not resolved internationally.

YES opened at 18% as the outbreak escalated in DRC, then collapsed steadily to 0.1% as CDC implemented entry screening on May 18, 2026 and travel restrictions on June 21, 2026.

We aggregate the live positions of the top 50 Polymarket whales (ranked by 30-day tracked volume) into one composite reading per market. It refreshes every hour. The percentage shows how many of those whales hold YES versus NO; the net dollar position shows the cohort's directional exposure in dollars.

A convergence event fires when three or more tracked wallets buy the same outcome on the same market within a four-hour window. We surface these in the activity feed and the VIP digest.

No. Lines is an editorial and data product. We do not operate prediction markets, custody funds, or accept trades. All trade flows deep-link to Polymarket via our affiliate code. Probabilities shown are market-implied and not predictions or recommendations.

Market Resolved Outcome: NO
Final Price 100%
Settled Jun 30, 2026
Duration 45 days

Resolution Analysis

What Happened

No Ebola case was confirmed in the United States by June 30, 2026. A DRC-based outbreak spread into Uganda and South Sudan, and an American missionary tested positive in DRC, but CDC entry screening and travel restrictions prevented any domestic case. The CDC explicitly confirmed zero US cases as of the resolution date.

Market Accuracy

The market correctly resolved NO. YES probability opened at 18%, reflecting genuine early-outbreak uncertainty, then collapsed to 0.1% as CDC containment measures took hold. The $328,219 in volume shows traders engaged seriously with the risk before systematically pricing it down as the public health response strengthened.

Key Turning Point

The CDC's May 18, 2026 implementation of public health entry screening and entry restrictions for travelers from DRC, Uganda, and South Sudan was the pivotal event. That announcement gave the market a structural reason to price YES toward zero, and the probability fell sharply from that point through resolution.

Forward Implications

The DRC outbreak remains active after June 30. CDC restrictions extended into July 2026, and US implementers continue active surveillance across over 100 health facilities in affected zones. A follow-on market covering Q3 2026 would carry real, if still low, probability given ongoing outbreak dynamics and the confirmed US national exposure in DRC.

Key macro factor: The CDC's rapid deployment of entry screening and travel restrictions in May 2026 provided a measurable structural barrier to domestic Ebola transmission that the market correctly interpreted.

Market Timeline

May 15, 2026, 6:29 PM
Market Created
May 15, 2026, 8:24 PM
Market Opened
Jun 30, 2026
Market Resolution

Market Comments

Probabilities shown are market-implied and not predictions or recommendations. This content is for informational purposes only.