Table 1. Parameters used in ABM.

Symbol	Parameter	One-parameter case input values	Two-parameter case input values
Δt	Time step	0.1	0.1
T	Total length of simulation	300	300
m	Total number of sub-populations	1	2
x 1,low	Lower x-direction domain boundaries	0	(0, 0.2)
x 1,high	High x-direction domain boundaries	0.1	(0.1, 0.3)
x 2,low	Lower y-direction domain boundaries	0	(0, 0)
x 2,high	High y-direction domain boundaries	0.1	(0.1, 0.1)
N pop	Sub-population sizes	100	(100, 100)
S 0	Initial fractions of susceptible agents	0.99	(0.99, 1)
E 0	Initial fractions of exposed agents	0	(0, 0)
I 0	Initial fractions of infected agents	0.01	(0.01, 0)
R 0	Initial fractions of recovered agents	0	(0, 0)
D I	Infection distance	0.005	0.005
μ e	Exposed time mean	11.6a	11.6a
σ e	Exposed time standard deviation	1.9a	1.9a
μ i	Infection time mean	18.49a	18.49a
σ i	Infection time standard deviation	3.71a	3.71a
[M1, M2]	Mobility uniform prior range	[0.005, 0.025]	[0.005, 0.025]
[J1, J2]	Jumping probability uniform prior range	[0, 0]	[0, 0.001]

^a Consistent with incubation and infection period (from fever to recovery) of smallpox as reported in [31], if the unit of time is days.