  In this work, we address a multicoupled dynamics on complex networks with
tunable structural segregation. Specifically, we work at a networked epidemic
spreading under a vaccination campaign with agents in favor and against the
vaccine. Our results show that such coupled dynamics exhibit a myriad of
phenomena such as nonequilibrium transitions accompanied by bistability.
Besides we observe the emergence of an intermediate optimal segregation level
where the community structure can favor the negative opinions about vaccination
but counterintuitively hinders - rather than enhance - the global disease
spreading. Thus, our results point out that vaccination campaigns should avoid
policies that end up segregating excessively anti-vaccine groups.
