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For other urban facilities, the lack of agglomeration is a risk factor.
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Consistent across the six global cities, geographical agglomeration is a risk factor for bars. Results: Results of the human mobility analysis reflect the geographical and cultural context of various facilities, transport characteristics and people's lifestyle across cities. Finally, a kernel density function is employed to derive the risk surface in each city based on the spatial risk class and nature of activities. Then, considering facility agglomeration, visitors' profile and the density of the population, facilities are classified into four potential spatial risk (PSR) classes. The study collects detailed human mobility and other locational data in Chicago, Hong Kong, London, São Paulo, Seoul and Zurich. Methods: Focusing on six common types of urban facilities (bars, cinemas, gyms and fitness centers, places of worship, public libraries and shopping malls), it first tests whether visitors' mobility characteristics differ systematically for different types of facility and at different locations.
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Introduction: This study sets out to provide scientific evidence on the spatial risk for the formation of a superspreading environment.
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