An analysis of the spatio-temporal behavior of COVID-19 patients in the week prior to diagnosis using activity trajectory data

After the outbreak, the official websites of Nanjing Municipal Health Commission (http://wjw.nanjing.gov.cn/) and Yangzhou Municipal Health Commission (http://wjw.yangzhou.gov.cn/) promptly posted text descriptions of the activities of confirmed patients. The patient activity trajectory data used in this paper is derived from this source.