Table 1. Description of physical characteristics, transmission, infectious, and vaccination parameters of the model with their baseline values and ranges used for simulations.

Symbol	Description	Value (Range)	Reference
c/b	Initial bird population size	984 birds	[34]
1/(b+my)	Mean infectious period of V-S strain	13.8 days	[34], [36]
ω	Transmissibility of V-S strain	4.78×10−4 day−1 individual−1	[34]
(b+my)/(b+mz)	Relative mean infectious period of V-R strain	1.32	[10], [12], [23]
ϕ/ω	Relative transmissibility of V-R strain	0.58	[10], [12], [23]
σ	Loss of vaccine effectiveness by V-R strain	Variable (0–1)	–
p	Prevalence rate of vaccination program	Variable (0–1)	–

These parameters are based on avian influenza epidemics in The Netherlands in 2003 [32], [33], [34]. Actually, V-S and V-R represent “vaccine-sensitive” and “vaccine-resistant”, respectively.