EPIDEMICS IN HETEROGENEOUS POPULATIONS: STOCHASTIC MODELLING
 
                       Tom Britton

                   Uppsala Universitet


After a short general introduction to epidemic models we define
a model for the spread of an infectious disease in a closed
population in which individuals may differ in terms of
susceptibility. An obvious question is then: Does a
heterogeneous population result in a larger outbreak than a
homogeneous population would do? Three different ways to
calibrate a heterogeneous population with a homogeneous one are
presented in the talk and each gives different answer to the
posed question.