Using individuals’ space-time trajectories data to investigate the relationship between geographic context and COVID-19 transmission risk
Topics: Geographic Information Science and Systems
, Medical and Health Geography
, Human-Environment Geography
Keywords: COVID-19 risk exposure estimates, space-time path, activity space, space-time cube
Session Type: Virtual Paper
Day: Wednesday
Session Start / End Time: 4/7/2021 01:30 PM (Pacific Time (US & Canada)) - 4/7/2021 02:45 PM (Pacific Time (US & Canada))
Room: Virtual 48
Authors:
Jianwei Huang, Chinese University of Hong Kong
Mei-Po Kwan, Chinese University of Hong Kong
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Abstract
This study aims to analyze people’s space-time paths and activity spaces using individual-level data (i.e., activity diaries of infected persons) to investigate the influence of venues for social gathering (VSG) (i.e., bars and restaurants) on COVID-19 risk in Hong Kong and the uncertainties of different measures of transmission risk. It examines the relationship between the COVID-19 risk of 60 infected persons and their exposure to various VSG in their daily lives using their historical activity data (i.e., their visits to these venues in the past 14 days before they were confirmed to be infected) collected by the Hong Kong Department of Health. Further, it compares four different types of COVID-19 risk exposure estimates generated by using (1) interactions between individual space-time paths with the spatiotemporal distribution of COVID-19 risk, (2) the strength of the close contact between each individual’s space-time path with those of others (i.e., measuring the spatiotemporal overlay among their space-time paths), (3) interactions between individual activity spaces with the spatial distribution of COVID-19 risk, and (4) the strength of close contact between each individual’s activity space with those of others (i.e., measuring the spatial overlay among their activity spaces). These four estimates of COVID-19 risk are significantly different, which has important implications for future research on infectious disease: using different measures to assess individuals exposure may lead to different results. Additionally, the results suggest that individuals exposed to VSG during the pandemic in Hong Kong significantly increased their COVID-19 risk.
Using individuals’ space-time trajectories data to investigate the relationship between geographic context and COVID-19 transmission risk
Category
Virtual Paper
Description
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