Figure 8.

The required stray dog vaccination targets to bring rabies under control in terms of natural death rate of stray dogs (b₁) and strength of density-dependent mortality (γ) for varying stray dog population size (determined by N₁ = (a₁ − b₁)/γ) when 70% of owned dogs are vaccinated. Owned dog population sizes are N₂ = N₃ = (A) 250, (B) 500, and (C) 1,250. The blue area indicates when rabies is controlled without stray dog vaccination. The purple area shows the minimum proportion of stray dogs that must be vaccinated to bring R₀ < 1.