Table 3.

List of key model parameters for which no data was available, and range considered.

parameter and description		range
ω2	probability of sub-clinical infection	0–1
γ2	annual rate of progression through the incubation stages for secondary infection (fixed at the primary infection value)	0.877
ρpre	proportion of incubation period that is non-infectious	0–1
βihβhi	combined transmission parameter	0–1
d	average number of operations for which an instrument stays infectious after initial contamination	1–100
ν	annual frequency with which a set of instruments is used	1–50