Table 1.

Parameter values used in simulations.

Parameter	Value or range	Unit	Interpretation
$N_1^{\ast }$	95,000	Individuals	Population size in patch 1
$N_2^{\ast }$	105,000	Individuals	Population size in patch 2
$m_{12}$	0.008	${\text{Day}}^{-1}$	Travel rate from patch 1 to patch 2
$m_{21}$	0.009	${\text{Day}}^{-1}$	Travel rate from patch 2 to patch 1
$d_1$	$1/(78\times 365)$	${\text{Day}}^{-1}$	Average life expectancy in patch 1 is 78 years
$d_2$	$1/(70\times 365)$	${\text{Day}}^{-1}$	Average life expectancy in patch 2 is 70 years
${\gamma }_1$	1/10	${\text{Day}}^{-1}$	Average infectious period 10 days
${\gamma }_2$	1/12	${\text{Day}}^{-1}$	Average infectious period 12 days
$a_1$	0.09 or 0.12	${\text{Day}}^{-1}$	Maximal effective contact rate in patch 1
$a_2$	0.08 or 0.11	${\text{Day}}^{-1}$	Maximal effective contact rate in patch 2
$b_1$	0.02 to 0.05	${\text{Day}}^{-1}$	Maximal reduced effective contact rate in patch 1
$b_2$	0.02 to 0.05	${\text{Day}}^{-1}$	Maximal reduced effective contact rate in patch 2