This article includes a list of references, but its sources remain unclear because it has insufficient inline citations. Please help to improve this article by introducing more precise citations. The establishment and spread of infectious an epidemic of absence pdf is a complex phenomenon with many interacting factors, e.
The role of mathematical epidemiology is to model the establishment and spread of pathogens. A predominant method of doing so, is to use the notion of abstracting the population into compartments under certain assumptions, which represent their health status with respect to the pathogen in the system. These models are known as compartmental models in epidemiology, and serve as a base mathematical framework for understanding the complex dynamics of these systems, which hope to model the main characteristics of the system. The way that these compartments interact is often based upon phenomenological assumptions, and the model is built up from there.
Also, one can understand how different situations may affect the outcome of the epidemic, e. The SIR model is one of the simplest compartmental models, and many models are derivations of this basic form. This model is reasonably predictive for infectious diseases which are transmitted from human to human, and where recovery confers lasting resistance, such as measles, mumps and rubella. Each cell can infect its eight immediate neighbors.