Figure 4
Sites of different mobility affect epidemic spreading. (a) Each cell labelled by (i, j) is characterized by its own mobility parameter \(\beta _{ij}\). We consider the special case of a binary mixture (\(\beta _{ij} = \beta _{1,2}\)) of high and low mobility regions. Changing the density \(\rho\) of \(\beta _2\) sites and the value of \(\beta _2\), we obtain the the phase diagram presented in panel (b), obtained for \(\beta _1=1.99\), \(\alpha =0.9\), and \(\gamma =0.05\), conditions that grant contained epidemic spreading thanks to the low-mobility group. A small amount of sites with small values of \(\beta _2\) can trigger the epidemic spreading.
