The Contribution of Social Behaviour to the Transmission of Influenza A in a Human Population
Comparison of different models in Figure 1A.
(A) Model based on all contacts with relative susceptibility of over-18s, α, equal to one. (B) Model based on close contacts with α = 1. (C) Model based on all contacts with variable α. (D) Model based on close contacts with variable α. Colour shows model support under the Akaike Information Criterion (AIC). Note that models with numerous contact classes in B and D had some classes consisting solely of individuals – some of whom had been infected – that had no reported close contacts. The likelihood of such people seeing infection given the model assumptions was zero; the difference in AIC was therefore infinite.