Complex dynamics of interacting diseases on clustered networks

The impact of clustering in a contact structure and the dynamics of multiple diseases interacting through coinfection are typically studied independently. We will see how clustering, which is well-known to hinder propagation of diseases, can actually speed up epidemic propagation in the context of synergistic coinfections if the strength of the coupling matches that of the clustering. We also show that such dynamics lead to a first order transition in endemic states, where small changes in transmissibility of the diseases can lead to explosive outbreaks, and regions where these explosive outbreaks can only happen on sufficiently clustered networks.