This market will resolve to "Yes" if the World Health Organization explicitly characterizes Hantavirus, Hantavirus Pulmonary Syndrome (HPS), Hemorrhagic Fever with Renal Syndrome (HFRS), or a Hantavirus-related outbreak as a "pandemic" in an official public communication between market creation and December 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to "No".

An explicit characterization includes official WHO statements, reports, press briefings, or publications that clearly describe the outbreak as a "pandemic." A Public Health Emergency of International Concern (PHEIC) alone will not qualify unless it is also described as a pandemic.

The primary resolution source for this market will be official WHO communications. A consensus of credible reporting may also be used.

Hantavirus pandemic in 2026?

This market resolves based on the total number of West Nile neuroinvasive disease cases (encephalitis, meningitis, and acute flaccid paralysis) reported among New York City residents in 2026, as published by the New York City Department of Health and Mental Hygiene on its West Nile Virus Reports page at nyc.gov/site/doh/health/health-topics/west-nile-virus-reports.page.

Cases are counted as whole numbers, so each outcome covers a distinct range with no overlap or gap.

The 2026 count shown on the source as of January 1, 2027 is the starting figure. 

If the DOHMH publishes or revises the 2026 count on or after January 1, 2027, this market will resolve based on the count shown on the source at 11:59 PM ET on the 14th day after the first such update, or on March 31, 2027, 11:59 PM ET, whichever comes first. If no such update occurs, this market will resolve on March 31, 2027, 11:59 PM ET, based on the 2026 count shown on the source at that time.

If no 2026 count has been published on the source by March 31, 2027, 11:59 PM ET, this market will resolve based on the sum of 2026 West Nile neuroinvasive disease case counts reported by CDC ArboNET for the five New York City counties (Bronx, Kings, New York, Queens, and Richmond). Revisions published after this market resolves will not be considered. If the DOHMH changes its reporting format or URL structure, the closest equivalent NYC Health Department publication of 2026 West Nile neuroinvasive case data will be used.

Fewer than 20

20 to 34

35 to 49

How many West Nile neuroinvasive disease cases will be reported among New York City residents in 2026?

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.

↑3k

↑3.5k

↑4k

measles

Measles cases in U.S. in 2026?

This market will resolve to "Yes" if there is a confirmed case of Ebola in the territory of the specified country reported between market creation and December 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to "No".

Any active laboratory-confirmed, or otherwise officially confirmed, Ebola infection identified within the territory of the specified country will qualify, regardless of where exposure, symptom onset, or testing occurred.

The primary resolution sources for this market will be official information from the relevant national and international health authorities; however, an overwhelming consensus of credible reporting will also suffice.


South Sudan

Kenya

Ethiopia

Which countries will have an Ebola case in 2026?

This market will resolve to "Yes" if any vaccine intended for humans and inoculating against Hantavirus (including Hantavirus Pulmonary Syndrome (HPS) or Hemorrhagic Fever with Renal Syndrome (HFRS)) receives full approval from the U.S. Food and Drug Administration between market creation and December 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to "No".

The primary resolution source for this market will be official information from the FDA, including its list of approved vaccines (https://www.fda.gov/vaccines-blood-biologics/vaccines/vaccines-licensed-use-united-states), however a consensus of credible reporting may also be used.

Hantavirus vaccine in 2026? 

This market will resolve to “Yes” if the World Health Organization explicitly characterizes Ebola virus disease, Ebola, any Ebola strain, or any outbreak of ebola as a “pandemic” in an official public communication between market creation and December 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to “No”.

An explicit characterization includes official WHO statements, reports, press briefings, or publications that clearly describe the outbreak as a “pandemic.” A Public Health Emergency of International Concern (PHEIC) alone will not qualify unless it is also described as a pandemic.

The primary resolution source for this market will be official WHO communications. A consensus of credible reporting may also be used.

Ebola pandemic in 2026?

This market will resolve to "Yes" if the World Health Organization (WHO) declares any disease a pandemic between market creation and December 31, 2027 11:59 PM ET. Otherwise, this market will resolve to "No". 

The resolution source will be official announcements from the World Health Organization.

New Pandemic

New pandemic before 2028?

This market will resolve to "Yes" if the World Health Organization (WHO) declares any disease a pandemic between January 1, 2026 and December 31, 2026 11:59 PM ET. Otherwise, this market will resolve to "No".

The resolution source will be official announcements from the World Health Organization.

New pandemic in 2026?

This market will resolve to "Yes" if the CDC identifies a new COVID variant of concern between December 1, 2025, and December 31, 2026, 11:59PM ET. Otherwise this market will resolve to "No".

The CDC's variant classification scheme can be found here: https://stacks.cdc.gov/view/cdc/107682.

The resolution source for this market will be official information from the CDC.

New COVID variant of concern before 2027?

This market will resolve to "Yes" if there have been the specified amount or more confirmed domestically acquired cases of cyclosporiasis in humans in the territory of the United States of America since May 1, 2026, according to the CDC surveillance count by August 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to "No".

The resolution source for this market will be the CDC Surveillance of Cyclosporiasis page’s “U.S. cases reported to CDC” count (see: https://www.cdc.gov/cyclosporiasis/php/surveillance/index.html) at the resolution time. If the counter becomes unavailable, another credible source will be used.

Note: Only cases reported by the CDC as confirmed domestically acquired cases of cyclosporiasis will qualify, regardless of reports from U.S. State agencies or other sources. Travel-associated cases acquired outside the United States will not qualify.

20,000+

10,000+

15,000+

Cyclosporiasis cases

Cyclosporiasis cases in U.S. by August 31?

This market will resolve to "Yes" if the World Health Organization (WHO) declares a new COVID pandemic other than COVID-19 (SARS-CoV-2) between market creation and December 31, 2026, 11:59 PM ET. Otherwise, this market will resolve to "No".

The resolution source will be official announcements from the World Health Organization.

New Coronavirus Pandemic

New Coronavirus Pandemic in 2026?

This market will resolve to “Yes” if either the United States federal government formally declares a national emergency, an extraordinary emergency, or uses another emergency authority to declare a national crisis in response to a screwworm (Cochliomyia hominivorax) outbreak in U.S. livestock by the specified date at 11:59 PM ET. Otherwise, this market will resolve to “No”. 

Statements, speeches, social media posts, draft orders, executive orders that do not formally declare an emergency will not qualify.

Renewals or extensions of previously existing national emergencies will not qualify unless the text is materially modified to explicitly relate to screwworm. 

The primary resolution source will be the Federal Register and official publications of the White House, Department of Agriculture, Secretary of Agriculture, or other federal departments or agencies, however a consensus of credible reporting may also be used.

August 30

June 30

Screwworm National Emergency declared by...?

This market will resolve to "Yes" if, at any point between market creation and September 30, 2026, 11:59 PM ET., a confirmed case of Ebola is reported in a country that had not reported any confirmed Ebola case in the current outbreak as of market creation. Otherwise, this market will resolve to "No".

The "current outbreak" is the Bundibugyo ebolavirus outbreak declared by the DRC on May 15, 2026. A "qualifying country" is any country other than the Democratic Republic of the Congo, Uganda, or France, each of which had recorded at least one confirmed case attributable to this outbreak as reported by Centers for Disease Control and Prevention (CDC) https://www.cdc.gov/ebola/situation-summary/index.html.

A "confirmed case" is a laboratory-confirmed Bundibugyo ebolavirus infection attributed to the current outbreak. A case counts for whichever country the qualifying source assigns it to in its reporting, regardless of where exposure, symptom onset, or specimen collection occurred. Resolution turns on the date a qualifying source publishes the confirmation — not the date of exposure, onset, or laboratory result. A report published after the deadline does not count even if the infection occurred earlier.

The primary resolution sources for this market will be official information from the relevant national and international health authorities, including CDC and the World Health Organization (WHO); however, an overwhelming consensus of credible reporting will also suffice.

Ebola: new country confirmed before October 1?

This market will resolve according to the weekly influenza-associated hospitalization rate per 100,000 population for the United States, as reported by CDC FluSurv-NET for the specified week.

The resolution source for this market will be CDC FluView / FluSurv-NET (see: https://www.cdc.gov/fluview/index.html). If the FluSurv-NET hospitalization rate for the specified week is not released by 11:59 PM ET on the tenth calendar day following the date of the prior FluView weekly report release, this market will resolve to the lowest bracket.

CDC FluView reports the weekly FluSurv-NET hospitalization rate per 100,000 population to one decimal point (e.g., 0.1). Thus, this is the level of precision that will be used when resolving the market. 

Note: Only the CDC FluSurv-NET weekly hospitalization rate per 100,000 population for the specified week will qualify, regardless of the cumulative influenza-associated hospitalization rate, estimates, projections, state-level reports, or other influenza surveillance metrics published by the CDC or other sources.

Pandemics