Figure 5.

(a) An illustration of the planar state neighborhood network (where the network can be drawn without having any edges overlap) for the lower 48 states of the USA (which excludes Hawaii and Alaska) is shown. (b) We expand upon network (a) to produce a non-planar network, where edges are added for each two-hop neighbor of a state to obtain a more detailed idea about how ILI is spreading around each state. For example, in (b), we added edges from two-hop neighbors of Texas (TX) to Texas (illustrated by the dotted edges). Note that (b) serves as an example and does not show every node or edge in our network