Susceptible-Infectious-Recovered (SIR) framework

The Susceptible-Infectious-Recovered (SIR) model is a way to understand how diseases spread within a population. It categorizes people into three groups: those who can catch the disease (susceptible), those who have the disease and can spread it (infectious), and those who have recovered and are now immune (recovered). The model traces how individuals move from one group to another over time, helping predict outbreak patterns. It’s a useful tool for public health planning, allowing experts to evaluate how interventions like vaccination or social distancing may limit or slow the spread of illness.