Optimal Control and Stability Analysis of an SEIR Model with Infectious Force in Latent Period

Figure 2

Equilibria global asymptotic stability of model (2). The first row is the case 1, and the second row is the case 2. (a, d) Initial values set as (120, 0, 15, 1, 0); (b, e) initial values set as (70, 0, 15, 1, 50); (c, f) initial values set as (20, 0, 15, 1, 100). (a) Case 1: initial value (120, 0, 15, 1, 0). (b) Case 1: initial value (70, 0, 15, 1, 50). (c) Case 1: initial value (20, 0, 15, 1, 100). (d) Case 2: initial values (120, 0, 15, 1, 0). (e) Case 2: initial values set as (70, 0, 15, 1, 50). (f) Case 2: initial values set as (20, 0, 15, 1, 100).

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(b)

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(f)