SIS Model

🛬 The Elimination–Importation SIS Model: Dynamics of Persistence in an Interconnected World 📈

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──────────────────────────────────────── 🧭 Conceptual Overview In the context of regional and national disease elimination efforts, local control alone is often insufficient. The Elimination–Importation SIS Model formalizes the reality that populations are not closed systems. Even when local transmission is suppressed below the epidemic threshold, a disease may persist due to the continual arrival of infectious individuals … Read more

📈 The Core-Group STI Model: Dynamics of High-Activity Reservoirs 🧬

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🏗️ Conceptual Overview In the epidemiology of sexually transmitted infections (STIs), population heterogeneity plays a dominant role. Transmission is often sustained by a relatively small subset of individuals with high rates of partner change. The Core-Group STI Model formalizes this observation by explicitly partitioning the population into activity-defined subgroups and examining how a highly active … Read more