Table 2. Cost reductions predicted by variations of the spatial model.

Model Variant	Total	Flight	Vaccine
Baseline model	22%	4%	18%
0.7 herd immunity threshold	16%	2%	15%
Temporary immunity	29%	4%	25%
Clustered vaccine distribution	22%	5%	16%
Lagged immunity	21%	4%	17%
Lifelong vaccine infection	29%	10%	19%
25% Increased vaccine cost	16%	2%	14%

“Total” column shows the percent reduction in total costs that result from using a transmissible vaccine with R_0,v = 1, relative a nontransmissible vaccine. “Flight” and “Vaccine” columns decompose the total reduction into savings from flight expenses, and expenses due to the purchase of vaccine baits. Percentages are rounded to the nearest whole number. The Baseline model describes a host population density of 10 km⁻². Other parameters of the Baseline model are: d = 0.416 yr⁻¹, δ_v = 12 yr⁻¹, ξ = 0.25 km, C_f = 18.16 km⁻¹, C_b = 2.12.