A TB Model with Infectivity in Latent Period and Imperfect Treatment

Figure 3

Phase plot of 𝑒 versus 𝑖 showing the existence of endemic equilibrium 𝑄^∗ which is stable when 𝑅₀>1, for the parameter values for the parameter values 𝑘=0.02 and the others are the same as Figure 2. Based on these parameters, 𝑅₀≈1.398>1.