Temporal and parametric behaviour of contact tracing.

<p>The system is started in the endemic equilibrium, and then contact tracing is started with success rate equal to A, C: or B, D: . Other parameters are at default values: . The level of infection over time for different values of clustering are shown in Panes A and B, while in C and D the difference between clustered and unclustered is shown parametrically against the unclustered result—above the dotted line, clustering implies more efficacious tracing, and vice versa.