Modeling the Spread of Tuberculosis in Semiclosed Communities

Figure 15

Signs of coefficients 𝐵, 𝐶, and discriminant Δ=𝐵²−3𝐴𝐶 as functions of exogenous reinfection rate of latent 𝛿 and exogenous reinfection rate of recovered 𝜂 for 𝑅₀⩾1. The parameter 𝛽 has the values: (a) 𝛽=𝛽_𝑅0=0.0002277727471, (b) 𝛽=0.0002287727471, (c) 𝛽=0.0002477727471, and (d) 𝛽=0.0005277727471.

(a) 𝑅₀=1

(b) 𝑅₀=1.004390340

(c) 𝑅₀=1.087806817

(d) 𝑅₀=2.317102260