Dynamics of a Delay-Varying Computer Virus Propagation Model

Figure 1

𝐼 versus 𝑆, where 𝑏=20,𝛽=0.01,𝛾=0.4,𝜇=0.2,𝜎=5, and 𝑅₀≈0.83 satisfy stable condition for the virus-free equilibrium 𝐸₀(50.00, 0).