How does the SIR model for disease spread work, and how can it be altered to explain airborne transmission?
In: Mathematics
SIR is an acronym that stands for “Susceptible, Infected, Removed”. Initially, the entire population is susceptible (except for patient 0, who is infected). Overtime, number of infected increases exponentially. However, when infected increase, the susceptible population decrease.
Eventually, the new cases start to slow down as infected population. When a person has been infected for some amount of time, they become part of the “removed” population. Some of the people in this group are dead, while most have gained immunity and cannot get the disease again. As for airborne transmission, the model itself does not need to be altered.
[Here](https://m.youtube.com/watch?v=Kas0tIxDvrg) is a good video about the SIR model.
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