{"source":"polymarket","id":"882557","ticker":"west-nile-neuroinvasive-cases-nyc-2026-20260820104404","slug":"west-nile-neuroinvasive-cases-nyc-2026-20260820104404","title":"How many West Nile neuroinvasive disease cases will be reported among New York City residents in 2026?","description":"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.\n\nCases are counted as whole numbers, so each outcome covers a distinct range with no overlap or gap.\n\nThe 2026 count shown on the source as of January 1, 2027 is the starting figure. \n\nIf 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.\n\nIf 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.","image":"https://polymarket-upload.s3.us-east-2.amazonaws.com/west-nile-neuroinvasive-cases-nyc-2026-20260820104404-u2zAg4ZYiHeI.png","icon":"https://polymarket-upload.s3.us-east-2.amazonaws.com/west-nile-neuroinvasive-cases-nyc-2026-20260820104404-u2zAg4ZYiHeI.png","active":true,"closed":false,"start_date":"2026-08-20T21:18:37Z","end_date":"2027-03-31T23:59:00Z","closed_time":null,"volume":2881.116909,"volume_24hr":2110.735686,"volume_24h_change":null,"normalized_vol_24hr":20.195173263549805,"normalized_volume":14.446395874023438,"liquidity":2805.1297,"open_interest":2044.934232,"categories":["Science and Technology","Climate and Weather"],"tags":[{"id":"74","slug":"science","label":"Science"},{"id":"84","slug":"weather","label":"Weather"},{"id":"104918","slug":"outbreak","label":"Outbreak"},{"id":"570","slug":"pandemics","label":"Pandemics"},{"id":"100091","slug":"new-york-city","label":"New York City"},{"id":"103037","slug":"climate-science","label":"Climate & Science"}],"synthetic":false,"is_group":false,"group_key":null,"parent_event_id":null,"probability":null,"spread":null,"top_outcome":"Fewer than 20","top_outcome_probability":0.42,"top_outcome_prob_24h_change":0.135,"top_outcome_volume_24h_change":651.4471909999999,"updated_at":"2026-08-23T23:43:00.466866Z","fetched_at":"2026-08-23T23:43:00.466866Z","added_at":"2026-08-20T21:55:48.318549Z","url":"https://polymarket.com/event/west-nile-neuroinvasive-cases-nyc-2026-20260820104404","chart_24h":[435.11,435.11,435.11,435.11,435.11,446.22111,457.33111,457.33111,460.76111,460.76111,460.76111,460.76111,460.76111,460.76111,460.76111,460.76111,460.76111,460.76111,460.76111,460.76111,460.76111,460.76111,460.76111,460.76111,2511.335686,2534.735686,2286.485686,2286.485686,2297.5956859999997,2110.735686,2110.735686],"markets":[{"source":"polymarket","id":"3751876","event_id":"882557","slug":"west-nile-neuroinvasive-cases-nyc-2026-fewer-than-20-20260820104404","question":"Will there be fewer than 20 West Nile neuroinvasive disease cases among NYC residents in 2026?","group_item_title":"Fewer than 20","description":"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.\n\nCases are counted as whole numbers, so each outcome covers a distinct range with no overlap or gap.\n\nThe 2026 count shown on the source as of January 1, 2027 is the starting figure. \n\nIf 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.\n\nIf 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.","image":"","icon":"","outcomes":["Yes","No"],"outcome_prices":[0.42,0.58],"probability":0.42,"spread":0.04,"active":true,"closed":false,"start_date":"2026-08-20T21:18:37Z","end_date":"2027-03-31T23:59:00Z","closed_time":null,"volume":749.507191,"volume_24hr":698.3071909999999,"prob_24h_change":0.135,"volume_24h_change":651.4471909999999,"normalized_vol_24hr":16.011512756347656,"normalized_volume":12.860636711120605,"liquidity":611.4874,"categories":["Science and Technology","Climate and Weather"],"countries":["United States"],"updated_at":"2026-08-23T23:46:38.577680Z","fetched_at":"2026-08-23T23:12:21.179735Z","added_at":"2026-08-20T21:55:48.411104Z","url":"https://polymarket.com/event/west-nile-neuroinvasive-cases-nyc-2026-20260820104404/west-nile-neuroinvasive-cases-nyc-2026-fewer-than-20-20260820104404","event_title":"How many West Nile neuroinvasive disease cases will be reported among New York City residents in 2026?","chart_24h":[0.285,0.34,0.285,0.265,0.265,0.275,0.275,0.265,0.25,0.275,0.275,0.275,0.275,0.25,0.265,0.26,0.265,0.26,0.26,0.255,0.27,0.27,0.43,0.43,0.43,0.43,0.43,0.42,0.42]},{"source":"polymarket","id":"3751877","event_id":"882557","slug":"west-nile-neuroinvasive-cases-nyc-2026-20-to-34-20260820104404","question":"Will there be 20 to 34 West Nile neuroinvasive disease cases among NYC residents in 2026?","group_item_title":"20 to 34","description":"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.\n\nCases are counted as whole numbers, so each outcome covers a distinct range with no overlap or gap.\n\nThe 2026 count shown on the source as of January 1, 2027 is the starting figure. \n\nIf 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.\n\nIf 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.","image":"","icon":"","outcomes":["Yes","No"],"outcome_prices":[0.395,0.605],"probability":0.395,"spread":0.03,"active":true,"closed":false,"start_date":"2026-08-20T21:18:37Z","end_date":"2027-03-31T23:59:00Z","closed_time":null,"volume":632.1089350000001,"volume_24hr":587.7611100000001,"prob_24h_change":0.03500000000000003,"volume_24h_change":547.7611100000001,"normalized_vol_24hr":15.181323051452637,"normalized_volume":12.208270072937012,"liquidity":649.0137,"categories":["Science and Technology","Climate and Weather"],"countries":["United States"],"updated_at":"2026-08-23T23:46:38.577680Z","fetched_at":"2026-08-23T22:46:03.165751Z","added_at":"2026-08-20T21:55:48.411104Z","url":"https://polymarket.com/event/west-nile-neuroinvasive-cases-nyc-2026-20260820104404/west-nile-neuroinvasive-cases-nyc-2026-20-to-34-20260820104404","event_title":"How many West Nile neuroinvasive disease cases will be reported among New York City residents in 2026?","chart_24h":[0.36,0.3,0.28,0.28,0.24,0.225,0.22,0.22,0.23,0.225,0.225,0.22,0.22,0.22,0.22,0.22,0.22,0.22,0.395,0.395,0.39,0.39,0.395,0.395]},{"source":"polymarket","id":"3751878","event_id":"882557","slug":"west-nile-neuroinvasive-cases-nyc-2026-35-to-49-20260820104404","question":"Will there be 35 to 49 West Nile neuroinvasive disease cases among NYC residents in 2026?","group_item_title":"35 to 49","description":"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.\n\nCases are counted as whole numbers, so each outcome covers a distinct range with no overlap or gap.\n\nThe 2026 count shown on the source as of January 1, 2027 is the starting figure. \n\nIf 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.\n\nIf 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.","image":"","icon":"","outcomes":["Yes","No"],"outcome_prices":[0.15,0.85],"probability":0.15,"spread":0.04,"active":true,"closed":false,"start_date":"2026-08-20T21:18:37Z","end_date":"2027-03-31T23:59:00Z","closed_time":null,"volume":1237.707385,"volume_24hr":784.1173849999999,"prob_24h_change":-0.19999999999999998,"volume_24h_change":475.8673849999999,"normalized_vol_24hr":16.582372665405273,"normalized_volume":14.880949020385742,"liquidity":817.1835,"categories":["Science and Technology","Climate and Weather"],"countries":["United States"],"updated_at":"2026-08-23T23:46:38.577680Z","fetched_at":"2026-08-23T23:12:21.179735Z","added_at":"2026-08-20T21:55:48.411104Z","url":"https://polymarket.com/event/west-nile-neuroinvasive-cases-nyc-2026-20260820104404/west-nile-neuroinvasive-cases-nyc-2026-35-to-49-20260820104404","event_title":"How many West Nile neuroinvasive disease cases will be reported among New York City residents in 2026?","chart_24h":[0.35,0.335,0.315,0.315,0.315,0.27,0.275,0.275,0.275,0.275,0.275,0.275,0.275,0.275,0.145,0.155,0.145,0.14,0.135,0.15,0.15]},{"source":"polymarket","id":"3751879","event_id":"882557","slug":"west-nile-neuroinvasive-cases-nyc-2026-50-or-more-20260820104404","question":"Will there be 50 or more West Nile neuroinvasive disease cases among NYC residents in 2026?","group_item_title":"50 or more","description":"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.\n\nCases are counted as whole numbers, so each outcome covers a distinct range with no overlap or gap.\n\nThe 2026 count shown on the source as of January 1, 2027 is the starting figure. \n\nIf 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.\n\nIf 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.","image":"","icon":"","outcomes":["Yes","No"],"outcome_prices":[0.085,0.915],"probability":0.085,"spread":0.07,"active":true,"closed":false,"start_date":"2026-08-20T21:18:37Z","end_date":"2027-03-31T23:59:00Z","closed_time":null,"volume":261.79339799999997,"volume_24hr":40.55,"prob_24h_change":-0.03499999999999999,"volume_24h_change":0.5499999999999972,"normalized_vol_24hr":5.183614253997803,"normalized_volume":9.106927871704102,"liquidity":370.1862,"categories":["Science and Technology","Climate and Weather"],"countries":["United States"],"updated_at":"2026-08-23T23:46:38.577680Z","fetched_at":"2026-08-23T22:46:03.165751Z","added_at":"2026-08-20T21:55:48.411104Z","url":"https://polymarket.com/event/west-nile-neuroinvasive-cases-nyc-2026-20260820104404/west-nile-neuroinvasive-cases-nyc-2026-50-or-more-20260820104404","event_title":"How many West Nile neuroinvasive disease cases will be reported among New York City residents in 2026?","chart_24h":[0.12,0.12,0.12,0.12,0.1,0.11,0.105,0.11,0.11,0.11,0.11,0.25,0.24,0.225,0.13,0.075,0.075,0.075,0.075,0.075,0.085,0.085]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/polymarket/882557","as_of":"2026-08-24T00:03:31.097488Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Polymarket): \"How many West Nile neuroinvasive disease cases will be reported among New York City residents in 2026?\" — top market at 15% probability across 4 outcomes","source_url":null}}