Table 2.

Models Studied and Corresponding Compartments.

Model	Respiratory	Nonrespiratory	Compartments
SIR	Influenza		S → I → R
SEIR	SARS	Polio, measles, smallpox, meningitis, West Nile virus	S → E → I → R
One-path SAIR		Hepatitis B, rubella	S → A → I → R
Two-path SAIR	Influenza	S cholera	$\mathit{S}\to \left\{\begin{array}{c}\mathit{A}\to {\mathit{R}}_{\mathit{A}}\hfill \\ I\to R_I\hfill \end{array}\right.$

Bolditalic compartments denote individuals who engage in disk-risk mitigation. Compartment classifications are shown in Table 1. For noncommunicable diseases (such as cholera or West Nile virus), it is assumed that the number of infectious individuals is proportionate to the infectious material, or the disease vector.