Question

Give 2 ways in which SIIR and SIS diseases and models differ.

Answer 1

These both are the epidemiological model for diseases which are a mathematical model of infectious diseases.

1. SIR disease model -

• This computes the number of susceptible, infected, and recovered people in a population.
• This model has three compartments for the disease like mesels, mumps, rubella. those are susceptible, infectious and recovered it means the population progress from susceptible to infectious to recovered.
• this confers long-lasting immunity.

2. SIS disease model -

• This model has only two compartment one is susceptible and 2nd is infectious.
• This model is appropriate for diseases that commonly have repeat infections like common cold and influenza.
• In this model infected individuals return to the susceptible class on recovery because the disease confers no long-lasting immunity.