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AI-DRAFTED — PHYSICIAN REVIEW IN PROGRESSThe citation for this entry was checked against Crossref and PubMed, but its summary and interpretation were drafted by an AI model from the published abstract and have not yet been individually read by a physician. Read the linked source before relying on this operationally.
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Analysis of a syndromic surveillance system for infectious diseases of the 31st summer World University Games in Chengdu, China[1]

Wang Y, Dai Y, Liu H, Feng S, Chen Y, Long L, Yan K, Du X, Du C, Wang L · 2025 · Front Public Health

Summary

Description and evaluation of the syndromic surveillance system run for the 2023 Chengdu Summer World University Games (Chengdu CDC): athletes, coaches, entourages, and staff surveilled from 1 week before to 1 week after competition for eight target symptoms (fever, cough, diarrhea, vomiting, rash, jaundice, conjunctival redness, sore throat) via a purpose-built Cloud Health Information System. Yield: 351 symptomatic subjects, 33 clustered-symptom events (none meeting outbreak criteria), 50 confirmed infections — 43 COVID-19, 3 influenza, and single cases of infectious mononucleosis, chikungunya, malaria, and infectious diarrhea. No secondary cases or outbreaks; authors conclude the system was sensitive and transferable to other mass gatherings.

So what

The operational middle layer of the surveillance stack MGMI has been assembling: participant-facing syndromic surveillance (this), population wastewater (Falender), individual wearables (Maddah), and epidemic-intelligence signal verification (Geoffroy). The yield profile is the teachable number — thousands surveilled, 33 clusters chased, zero outbreaks — the same assurance-not-case-counts economics Geoffroy found at Paris 2024, but with the full mechanism described (symptom set, reporting window, information system). The chikungunya and malaria detections show the imported-disease catch that justifies the athlete-village use case. Free PMC full text.

Key findings

  • Full mechanism description: 8 target symptoms, -1wk to +1wk window, purpose-built cloud system
  • Yield: 351 symptomatic, 33 symptom clusters, 0 outbreaks
  • 50 confirmed infections: 43 COVID-19, 3 influenza, 1 each mono/chikungunya/malaria/diarrhea
  • Imported vector-borne detections (chikungunya, malaria) validate the athlete-village use case
  • Same assurance-economics as Geoffroy at Paris 2024, with the mechanism published; free PMC

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