2. Model Formulation
The CA model proposed here is derived from the deterministic SEIR model. The variation from the standard SIR, SIS or SIRS models is that they do not consider latent class so that a person who catches the disease becomes infectious instantaneously. However, several diseases, such as Influenza, measles and mumps [2, 6], have a latent
period, during which individuals are exposed to the disease but are not yet infectious. Our studied SEIR CA model is described as follows: