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Schematic of a compartmental model of plague transmission among humans, rats, and fleas. The mathematics are described in Equations (S7)–(S15) in the Supplementary Materials. Figure S8 provides the transition rates. (a) SIR compartmental model for bubonic plague in rats. (b) Compartmental model for fleas carrying bubonic plague. (c) SEIR compartmental model for human plague transmission.
