{"index":"Sithi Illness Index","status":"experimental","week_commencing":"2026-10-19","week_ending":"2026-10-25","release":"2026-10-27T10:00:00+00:00","generated":"2026-10-27T09:30+00:00","headline":"In the week to 25 October the Sithi Illness Index for coughs, colds and flu stood at 46, low for winter, unchanged on the week before. Sickness bugs stood at 52, in the typical winter range.","measures":{"resp":{"name":"Coughs, colds and flu","value":46,"band":"low","weights_used":{"model":1.0},"inputs":{"lab":{"value":44.7,"data_week":"2026-10-12"},"model":{"value":45.6,"data_week":"2026-10-19","lab_week":"2026-10-12","lab_prev":44.634590841439056,"lab_prev_week":"2026-10-05","trends_used":true,"search_week":"2026-10-19","search_change_pct":1.3,"search_index":83.0,"steps":{"momentum":0.0,"search_change":0.5,"search_gap":0.4},"log_change":0.0199},"trends":{"value":83.0,"data_week":"2026-10-19","change_pct":1.3}},"method":"nowcast","panel_status":"building"},"gi":{"name":"Sickness bugs","value":52,"band":"typical","weights_used":{"trends":0.333,"synd":0.333,"lab":0.333},"inputs":{"lab":{"value":37.7,"data_week":"2026-10-05"},"synd":{"value":71.3,"data_week":"2026-10-12","score":0.857,"systems":["ed","gpih","rha"]},"trends":{"value":45.9,"data_week":"2026-10-19"}},"method":"weighted inputs","panel_status":"building"}},"panel":{"week_commencing":"2026-10-19","responses":0,"status":"building","threshold":300},"notes":[],"config_version":"2.0 (24 October 2026)","attribution":"Sources: Sithi household survey; Google Trends; UKHSA (contains public sector information licensed under the Open Government Licence 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