On the Analysis of a Continuous-Time Bi-Virus Model
  Motivated by the spread of opinions on different social networks, we study a distributed continuous-time bi-virus model for a system of groups of individuals. An in-depth stability analysis is performed for more general models than have been previously considered, for the healthy and epidemic states. In addition, we investigate sensitivity properties of some nontrivial equilibria and obtain an impossibility result for distributed feedback control. 
Ji Liu, Philip E. Par\'e, Angelia Nedi\'c, Choon Yik Tang, Carolyn L.   Beck, and Tamer Ba\c{s}ar
math.OC math.DS