Table 1.

Parameters describing influenza transmission dynamics in swine.

event	transition	parameter	value	references
waning maternal immunity	M → S	ωm	1/6 week−1	[19]
infection of susceptible pigs	S → I	R0γS(t)	varies
recovery from infection/infectiousness	I → R	γ	1 week−1	[20–22]
waning immunity from infection (in sows)	R → S	ωs	1/39 week−1	assumption