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. 2006 Oct 3;3(10):e387. doi: 10.1371/journal.pmed.0030387

Figure 1. Network Model.

Figure 1

(A) A schematic of a network model for an urban population. Each individual is a vertex in the network, and edges represent potentially disease-causing contacts between individuals. Directed edges (with arrows) represent transmission occurring in only one direction.

(B) We model vaccination in a population by removing nodes from the population network, and the edges that are attached to them.

HCW, health-care worker.