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DTSTART:19960101T000000 END:STANDARD BEGIN:STANDARD TZNAME:GMT TZOFFSETFROM:+0100 TZOFFSETTO:+0000 DTSTART:19961027T020000 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20260427T064524Z DTSTART;VALUE=DATE-TIME:20250224T130000 DTEND;VALUE=DATE-TIME:20250224T140000 SUMMARY:WCPM: Alice Cobella\, ÌÇÐÄTV TZID:Europe/London UID:20250224-8ac672c493cda1240193cff0a10017bf@warwick.ac.uk CREATED:20250213T220633Z DESCRIPTION:Location: A2.05B (there will be an informal sandwich lunch ou tside D2.02 at 12.30) Time: 13.00-14.00 To join this meeting online clic k here. Link opens in a new windoLink opens in a new window Modelling se verity of emerging epidemics via state-space models and the lifebelt par ticle filter. The inference of the severity (measured as probability of death) of an emerging epidemic is a non-trivial statistical challenge. I nformation on the most severe events is often collected in terms of time series of the counts of severely symptomatic cases and deaths per day/w eek\; no data are usually available on the number of patients who recove r from the disease or on timing between consecutive events. Cumulative-b ased counts estimators are well known to be biased but they are still co nsidered the gold standard\, as the lack of suitable data seems to preve nt the use alternative methods. In this talk we approach this problem fr om a state-space model (SSM) perspective\, properly accounting for all t he unknown underlying processes. Particle-filtering methods can be used to drive Bayesian inference of the severity parameters of interest\, but they are prone to fail in this context given the low counts and discret e system. We propose the Lifebelt Particle Filter (LBPF)\, a new particl e method that is robust to particle collapse thanks to the use of determ inistic mixtures in the importance distribution and a conservative resam pling scheme LOCATION:A2.05B CATEGORIES:WCPM,Women in Science LAST-MODIFIED:20250213T220633Z ORGANIZER;CN=Sarah Jarratt: END:VEVENT END:VCALENDAR