Table 1.

Parameter and state variable definitions and notations

	Notation	Description	Unit
	N	Number of nodes in the network	People
Network		Spatial network	–
Parameters		Scale-free random network	–
		Real-world network	–
	${\omega }_{\mathit{ij}}$	The connectivity level between two neighbors i and j	1
	$\overline{C}$	Average number of contact per time for random networks	Contact/time
	${\beta }_k$	Prob. of transmission per contact per time for individuals contacting viral strain $V_k$	1/contact
Infection	$\rho$	Per time removal (death or recovery) probability from virus k	1/time
Parameters	${\tau }_s$	Time period between infection and development of symptoms for individuals infected with viral strain $V_1$	Time
	$\psi$	Prevalence threshold: Infection prevalence to start SD	1
Intervention	${\sigma }_M$	Mandated SD: fraction of removed contacts	1
Parameters	${\sigma }_S$	Self-regulated SD against $V_1$: fraction of removed contacts	1
	${\tau }_M$	Duration of mandated SD	Time

Here, SD stands for social distancing