Modeling the Spread of Tuberculosis in Semiclosed Communities

Figure 16

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=0.0002177727471, (b) 𝛽=0.0002027727471, (c) 𝛽=0.0001777727471, and (d) 𝛽=0.0001277727471.

(a) 𝑅₀=0.9560965911

(b) 𝑅₀=0.8902414781

(c) 𝑅₀=0.7804829561

(d) 𝑅₀=0.5609659131