Table S1.

Simulation parameters used in the spatially extended Gillespie simulations with low saturation

Reaction	Rate
$A_n^{*}+R_n\to A_n^{*}{R}_n$	$5\times {10}^{-2}$
$A_n^{*}{R}_n\to A_n^{*}+R_n$	$5\times {10}^{-4}$
$A_n^{*}{R}_n\to A_n^{*}+R_n^{*}$	$1\times {10}^{-3}$
$I_n^{*}+R_n^{*}\to I_n^{*}{R}_n^{*}$	$5\times {10}^{-2}$
$I_n^{*}{R}_n^{*}\to I_n^{*}+R_n^{*}$	$5\times {10}^{-4}$
$I_n^{*}{R}_n^{*}\to I_n^{*}+R_n$	$1\times {10}^{-3}$
$S_n+A_n\to S_n{A}_n$	$5\times {10}^{-2}$
$S_n{A}_n\to S_n+A_n$	$5\times {10}^{-4}$
$S_n{A}_n\to S_n+A_n^{*}$	1 × 10−3
$A_n^{*}\to A_n$	$1\times {10}^{-4}$
$I_n+S_n\to I_n{S}_n$	$5\times {10}^{-2}$
$S_n{I}_n\to S_n+I_n$	$5\times {10}^{-4}$
$S_n{I}_n\to S_n+I_n^{*}$	$1\times {10}^{-3}$
$I_n^{*}\to I_n$	$1\times {10}^{-4}$
$I_n^{*}\to I_{n+1}^{*}$	$1\times {10}^{-2}$
$I_n^{*}\to I_{n-1}^{*}$	$1\times {10}^{-2}$
$I_n\to I_{n+1}$	$1\times {10}^{-2}$
$I_n\to I_{n-1}$	$1\times {10}^{-2}$