Supplemental Information for: Dynamic network entropy (DNE) for pinpointing the pre-outbreak stage of infectious disease

A. The theoretical background; B. Construction of the Tokyo urban network and comparative validation; C. Impact of different features on early warning performance; D. Identifying the pre-outbreak stage; E. Determination of the temporal window width; F. Identification of pre-outbreak stages for simulated data; G. Identification of pre-outbreak stages for influenza; H. Identification of pre-outbreak stages for HFMD; I. Transparency verification; J. The time-window entropy in specific places without any geographical structure