O. Diekmann et al., A DETERMINISTIC EPIDEMIC MODEL TAKING ACCOUNT OF REPEATED CONTACTS BETWEEN THE SAME INDIVIDUALS, Journal of Applied Probability, 35(2), 1998, pp. 448-462
We introduce a certain population contact structure and derive, in thr
ee different ways, the final size equation for a quite general superim
posed epidemic process. The contact structure is characterized by the
following two properties: (i) each individual contacts exactly k other
individuals; (ii) these k acquaintances are a random sample of the (i
nfinite) population.