Epidemiology: The SEIR model
From JSXGraph Wiki
For many important infections there is a significant period of time during which the individual has been infected but is not yet infectious himself. During this latent period the individual is in compartment E (for exposed).
Assuming that the period of staying in the latent state is a random variable with exponential distribution with parameter a (i.e. the average latent period is a − 1), and also assuming the presence of vital dynamics with birth rate equal to death rate, we have the model:
Of course, we have that S + E + I + R = N.
The lines in the JSXGraph-simulation below have the following meaning:
* Blue: Rate of susceptible population * Black: Rate of exposed population * Red: Rate of infectious population * Green: Rate of recovered population (which means: immune, isolated or dead)
