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. 2021 Feb 18;6(1):14. doi: 10.1007/s41109-021-00361-y

Fig. 1.

Fig. 1

Population co-location probability among US counties. A node represents a county; an edge represents the co-location relationship between two counties. The size of a node is proportional to the number of confirmed cases in a county; the width of an edge is proportional to the co-location probability of two counties