In addition to Pathogens, the other class that is crucial for epidemic modeling is SimEMIndividual, which defines an agent that can carry and transmit a pathogen.

• Infection states: for each pathogen, there is a corresponding infection state in a SimEMIndividual that records which SimInfectionStage (see Pathogens) it is in.
• Immune system: SimImmuneSystem is a class that defines how the individual should respond to a challenge of a pathogen. By default, there is no immunity.
  • A SimInfectionHistory class, which is a subclass of SimImmuneSystem, is defined that represents long-long immunity for an individual against all the previously infected diseases.

Files

• The definitions simemindividual.h
• The implementation simemindividual.cpp