{"source":"kalshi","id":"KXPOLIO-26","ticker":"KXPOLIO-26","slug":"KXPOLIO-26","title":"Will there be a case of polio in the USA this year?","description":null,"image":null,"icon":null,"active":true,"closed":false,"start_date":"2026-03-25T14:00:00Z","end_date":"2027-01-31T15:00:00Z","closed_time":null,"volume":7968.39,"volume_24hr":10.0,"volume_24h_change":null,"normalized_vol_24hr":2.1334893703460693,"normalized_volume":21.24905776977539,"liquidity":null,"open_interest":4233.64,"categories":["Health"],"tags":[],"synthetic":false,"is_group":false,"group_key":null,"parent_event_id":null,"probability":null,"spread":null,"top_outcome":"In 2026","top_outcome_probability":0.18,"top_outcome_prob_24h_change":-0.010000000000000009,"top_outcome_volume_24h_change":-5.09,"updated_at":"2026-06-10T04:47:51.508276Z","fetched_at":"2026-06-10T04:47:51.508276Z","added_at":null,"url":"https://kalshi.com/markets/kxpolio/will-there-be-a-case-of-polio-in-the-usa-this-year/kxpolio-26","chart_24h":[25.09,10.0],"markets":[{"source":"kalshi","id":"KXPOLIO-26-0","event_id":"KXPOLIO-26","slug":"KXPOLIO-26-0","question":"Will there be a case of polio in the USA this year?","group_item_title":"In 2026","description":"If there are above 0 cases of polio in the United States in 2026, then the market resolves to Yes.","image":null,"icon":null,"outcomes":["Yes","No"],"outcome_prices":[0.18,0.8200000000000001],"probability":0.18,"spread":0.05000000000000002,"active":true,"closed":false,"start_date":"2026-03-25T14:00:00Z","end_date":"2027-01-31T15:00:00Z","closed_time":"2027-01-31T15:00:00Z","volume":7968.39,"volume_24hr":10.0,"prob_24h_change":-0.010000000000000009,"volume_24h_change":-5.09,"normalized_vol_24hr":2.2667884826660156,"normalized_volume":24.735937118530273,"liquidity":null,"categories":["Health"],"countries":["United States"],"updated_at":"2026-06-10T10:11:42.595552Z","fetched_at":"2026-06-10T10:11:42.595552Z","added_at":null,"url":"https://kalshi.com/markets/kxpolio/will-there-be-a-case-of-polio-in-the-usa-this-year/kxpolio-26","event_title":"Will there be a case of polio in the USA this year?","chart_24h":[0.19,0.19,0.19,0.19,0.19,0.19,0.19,0.19,0.19,0.19,0.19,0.18,0.18,0.18,0.18,0.18,0.18,0.18,0.18,0.18,0.18,0.18,0.18,0.18,0.18,0.18]}],"_meta":{"attribution":"pdata.world — aggregated prediction-market data across 8 platforms","canonical_url":"https://pdata.world/events/kalshi/KXPOLIO-26","as_of":"2026-06-10T10:22:39.042286Z","docs":"https://api.pdata.world/docs","cite_as":"According to pdata.world (tracking Kalshi): \"Will there be a case of polio in the USA this year?\" — top market at 18% probability across 1 outcome","source_url":null}}