2.7. Basic Reproductive Ratio
Equations (7)–(9) give the analytic expression of the basic reproductive ratio (R0) for the model used in this study. This expression for R0 can be deconstructed into two components. Equation (8) only contains parameters associated with person to person transmission (Rp), while Equation (9) solely contains parameters associated with transmission from the environment (Re). In the Supplementary Materials, we provide additional information on these terms and their derivations. Applying the parameters values in Table 2, the numerical value of the basic reproductive ratio is given as R0 ~ 2.82. (7) R0=RpRp2+4Re22 (8) Rp=εβAμI+v+βI1−pωμ+εμ+ωμI+v (9) Re2=εβWσAμI+v+σI1−pωkμ+εμ+ωμI+v