Table 7.

Threshold parameter ${\mathcal{R}}_0$ under the effect of persistent vaccination.

Vaccination levels (%)	Threshold parameter ${\mathcal{R}}_0$
0	$1.9860>1$
20	$1.4750>1$
40	$1.1910>1$
60	$1.0110>1$
61	$0.9991<1$