Fig. 2
From: Modeling the influence of Twitter in reducing and increasing the spread of influenza epidemics
a Illustration of disease-free equilibrium of the system (1) is globally asymptotically stable when \(R_0<1\) and the positive information more than negative information (i.e., \(\alpha p - \delta q>0\), b illustration of disease-free equilibrium of the (1) is globally asymptotically stable when \(R_0<1\) and the negative information more than positive information (i.e., \(\alpha p - \delta q>0\)