Variable

Interpretations

$S_h\left(t\right)$

Individuals who are at risk of contracting Listeriosis infections.

$I_h\left(t\right)$

Individuals who are showing symptoms of Listeriosis infections.

$R_h\left(t\right)$

Individuals who have recovered from Listeriosis infections.

$S_v\left(t\right)$

Animals that are at risk of contracting Listeriosis infections.

$I_v\left(t\right)$

Animals that are showing symptoms of Listeriosis infections.

$R_v\left(t\right)$

Animals that have recovered from Listeriosis infections.