SIS model with demography

──────────────────────────────────────────── 🧠 Conceptual OverviewIn infectious disease dynamics, the SIS (Susceptible–Infectious–Susceptible) model with demography provides a foundational framework for pathogens that do not confer immunity after recovery. Individuals who recover immediately return to the susceptible class, enabling repeated infections over their lifetime. By incorporating vital dynamics—specifically, births and natural deaths at equal per-capita rates—the model transitions … Read more