  We present the analysis of the interrelation between two processes accounting
for the spreading of an epidemics, and the information awareness to prevent its
infection, on top of multiplex networks. This scenario is representative of an
epidemic process spreading on a network of persistent real contacts, and a
cyclic information awareness process diffusing in the network of virtual social
contacts between the same individuals. The topology corresponds to a multiplex
network where two diffusive processes are interacting affecting each other. The
analysis using a Microscopic Markov Chain Approach (MMCA) reveals the phase
diagram of the incidence of the epidemics and allows to capture the evolution
of the epidemic threshold depending on the topological structure of the
multiplex and the interrelation with the awareness process. Interestingly, the
critical point for the onset of the epidemics has a critical value
(meta-critical point) defined by the awareness dynamics and the topology of the
virtual network, from which the onset increases and the epidemics incidence
decreases.
