Table 4.

Number of averted infections and total cost of each strategy.

Strategy	Optimal controls	Total averted infection	Total cost$\left(\$\right)$
A	$u_1^{\ast },u_2^{\ast },u_3^{\ast }$	3.1759011542$\times 10^7$	2.6948381827$\times 10^{10}$
C	$u_1^{\ast },u_2^{\ast },u_4^{\ast }$	5.0514307367$\times 10^7$	2.6948531892$\times 10^{10}$
D	$u_2^{\ast },u_3^{\ast },u_4^{\ast }$	5.0649322004$\times 10^7$	2.6947166397$\times 10^{10}$
B	$u_1^{\ast },u_3^{\ast },u_4^{\ast }$	5.0664136828$\times 10^7$	2.694838206$\times 10^{10}$
E	$u_1^{\ast },u_2^{\ast },u_3^{\ast },u_4^{\ast }$	5.0664136829$\times 10^7$	2.6948382112$\times 10^{10}$