Table 1.

Components of the linear S${}^{\mathrm{p}}$I${}^{\mathrm{n}}$I${}^{\mathrm{t}}$I${}^{\mathrm{b}}$D-N.

Component	Description
$a_{11}$, $a_{21}$, $a_{31}$, $a_{41}$, $a_{51}$	Unknown internal parameters of the $S^p$, $I^n$, $I^t$, $I^b$,and $D$, respectively.
$a_{12}$, $a_{22}$, $a_{23}$, $a_{32}$, $a_{33}$, $a_{42}$, $a_{43}$, $a_{52}$	Unknown coupling parameters of the $S^p$, $I^n$, $I^t$, $I^b$, and $D$.
$b_1$, $b_2$, $b_3$, $b_4$, $b_5$	Unknown parameters of the non-pharmacological policies contributing to the $S^p$, $I^n$, $I^t$, $I^b$, and $D$ sub-models, respectively.