Since contact tracing takes place as a process over the network of interactions between hosts, it is natural to consider networkbased models of this process. Theoretical work has so far dealt with contact tracing as a branching process [12] , through modifications to mean-field equations [13] , pairwise approximations [14] and simulation [15] . This work means that the implications of heterogeneous numbers of contacts (and related network properties such as assortativity) for the efficacy of contact tracing are reasonably well understood.