Predicting Rift Valley Fever Inter-epidemic Activities and Outbreak Patterns: Insights from a Stochastic Host-Vector Model
Fig 3
Solution of Eq (14) when the product R12 × R21 is greater than unity.
The curves in (a) and (b) are contours in the plane (R12, R21), along which the probabilities of extinction and invasion respectively, after an introduction of a single vector is constant. In (c) and (d) we plot probabilities of extinction and invasion respectively, when varying parameters α1 and α2. The values of the remaining parameters in days are as follows: μ1 = 1/30, μ2 = 0.00046, β12 = 0.676, β21 = 0.28, ϵ2 = 0.25, m0 = 10.