Figure 1

Illustration of the variation of the epidemic threshold with respect to the parameters \(\pmb{\gamma_{1}}\) and  \(\pmb{\gamma_{2}}\) . Left: Plot of \(\lambda_{c}\) versus \(\gamma_{1}\) for different \(\gamma_{2}\). Right: Plot of \(\lambda_{c}\) versus \(\gamma_{1}\gamma_{2}\). Other parameters are chosen as \(\alpha=1.05\), \(\beta=0.9\), \(\delta=0.8\) and \(\langle k\rangle=10\). ‘SF’ means stochastic simulations and ‘MM’ means mean-field predictions.