2.1.Assumptions
The SIR Model is used in epidemiology to compute the amount of susceptible,
infected, recovered people in a population. This model is an appropriate one to use under
the following assumptions [3]:
1) The population is fixed.
2) The only way a person can leave the susceptible group is to become infected.
The only way a person can leave the infected group is to recover from the
disease. Once a person has recovered, the person received immunity.
3) Age, sex, social status, and race do not affect the probability of being infected.
4) There isno inherited immunity.
5) The member of the population mix homogeneously (have the same
interactions with one another to the same degree).