Table 2. Key Model Parameters for Simulations.

Model Parameter Definition	Value	Reference
Prob. of transmission from one sharing event ()	0.00995	[36]
Rate of importing infection into a node ()	varies	[36]
Proportion of spontaneously clearing nodes	0.25	[59], [79]
Prevalence at end of burn-in phase	0.56	[36]
Edgewise weekly probability of sharing (both less-frequent users)	0.19	[36]
Edgewise weekly probability of sharing (one less-frequent user)	0.18	[36]
Edgewise weekly probability of sharing (two more-frequent users)	0.24	[36]
Incidence rate ratio for imported infections of freq. vs. non-freq. users	1.3	[36]
Mean time to chronic spontaneous clearance (years)	200	[80]
Duration of latent period (weeks)	2	[81]
Mean time to acute spontaneous clearance (weeks)	7	[79]
Duration of acute phase (weeks)	26	by definition

Key model parameters used for transmission and treatment simulations. Less-frequent users have injecting behaviour less than weekly (on average) while more-frequent users have injecting behaviour at least weekly (on average). Rate of importing infection [36] is modified to account for varying prevalence.