compartmental disease transmission model Susceptible-Exposed-Infectious-Recovered model William R. Hogan Matthew Diller A compartmental disease transmission model that represents some infection in ecosystem in which there are compartments for susceptible individuals, exposed individuals, infectious individuals, and immune inviduals, such that exposed individuals are infected but cannot transmit the pathogen. A compartmental disease transmission model that represents some infection in ecosystem in which there are compartments for susceptible individuals, exposed individuals, infectious individuals, and immune inviduals, such that exposed individuals are infected but cannot transmit the pathogen.